Dynamic terrain loading on one scene

Ok so I am trying to dynamically load the terrain based off where the camera is supposed to be.

In my scene, I have a 4x4 terrain, resulting in 16 tiles. It is important to note that my following code works for any terrain as long as:

the square root of the total amount of terrain tiles, divided by 4 leaves no remainder. Here is the code below that stores the terrains (placed in order) from a 1d array list, into a 2d array. Then this code sets the neighbor for each terrain.

 using UnityEngine;
 using System.Collections;
 
 public class TerrainLoader : MonoBehaviour
 {
     [HideInInspector]
     public Terrain[] TerrainList;
 
     [HideInInspector]
     public Terrain[,] TerrainGrid;
 
 
 
 
     void Start()
     {
         TerrainList = GetComponentsInChildren<Terrain>();
         if (Mathf.Sqrt(TerrainList.Length) % 4 == 0 || TerrainList.Length == 4)
         {
             TerrainGrid = new Terrain[(int)Mathf.Sqrt(TerrainList.Length), (int)Mathf.Sqrt(TerrainList.Length)];
             print("Will proceed -> amount of terrain tiles are divisiable by 4 and are square roots");
             AssignTerrains();
         }
         else
         {
             print("Cannot proceed. The amount of terrain's entered are not a multiple of 4 and is a squared number");
 
         }
 
     }
 
     void AssignTerrains()
     {
         int count = 0;
         for (int row = 0; row < TerrainGrid.GetLength(0); row++)
         {
 
             for (int col = 0; col < TerrainGrid.GetLength(1); col++)
             {
 
                 TerrainGrid[row, col] = TerrainList[count];
                 #region print statement
                 /*
                 print("On row " + row);
                 print("On column " + col);
                 print("We put in " + TerrainGrid[row, col].name);
                 print("--------------------------------");
                 */
                 #endregion
                 count++;
             }
         }
 
         SetNeighbors();
 
     }
 
     void SetNeighbors()
     {
 
         for (int row = 0; row < TerrainGrid.GetLength(0); row++)
         {
             for (int col = 0; col < TerrainGrid.GetLength(1); col++)
             {
 
                 Terrain Left = (col == 0) ? null : TerrainGrid[row, col - 1];
                 Terrain Top = (row == 0) ? null : TerrainGrid[row - 1, col];
                 Terrain Right = (col + 1 == TerrainGrid.GetLength(1)) ? null : TerrainGrid[row, col + 1];
                 Terrain Bottom = (row + 1 == TerrainGrid.GetLength(0)) ? null : TerrainGrid[row + 1, col];
 
                 TerrainGrid[row, col].SetNeighbors(Left, Top, Right, Bottom);
 
                 #region Print statement checks
                 /*
                 string txtLeft = (Left == null) ? "Nothing" : Left.name;
                 string txtTop = (Top == null) ? "Nothing" : Top.name;
                 string txtRight = (Right == null) ? "Nothing" : Right.name;
                 string txtBottom = (Bottom == null) ? "Nothing" : Bottom.name;
 
                 print("Using terrain " + TerrainGrid[row, col].name);
                 print("The left of this terrain is " + txtLeft);
                 print("The Top of this terrain is " + txtTop);
                 print("The Right of this terrain is " + txtRight);
                 print("The Bottom of this terrain is " + txtBottom);
                 print("------------------------------------------------");
                 */
                 #endregion
 
             } // end col
         }
 
     }
 
 
 
 }

Ok so all of that works. The terrains are stored in a 2d array and have their neighbors set. Now what do i do in order to have the camera load these terrains based off what it is? I image it would be something like creating a script for the camera and the code would be something like:

 Camera mainCam;
 TerrainLoader t1 = new TerrainLoader();
 for (int row = 0; row < t1.TerrainGrid.GetLength(0); row++)
          {
  
              for (int col = 0; col < t1.TerrainGrid.GetLength(1); col++)
              {
  
                  if(mainCam.transform.position == t1.TerrainGrid[row , col])
                  {
                              t1.TerrainGrid[row , col].load();
                  }
 
              }
          }