Can figure out how to score individuals in a enemy group

So I'm creating a Space invaders like game and I have my enemies in a Enemy group. There are different enemies in the group and they are suppose to score differently. So far my code take the first enemy that gets killed and uses its score for the rest of the enemies. I'm new to Unity and I am guessing I am calling the the enemy controller script for the individual enemy wrong, Please help!

This is my simple enemy controller script:

 using System.Collections;
 using System.Collections.Generic;
 using UnityEngine;
 
 public class EnemyController : MonoBehaviour {
 
 public int score;
 
 }

This is my game manager script:

 using System.Collections.Generic;
 using UnityEngine;
 using UnityEngine.UI;
 using UnityEngine.SceneManagement;
 
 public class GameSceneManager : MonoBehaviour {
 
 public Camera mainCamera;
 public Text scoreText;
 public Text gameOverText;
 public PlayerController thePlayer;
 
 public EnemyGroupController enemyGroup;
 //call from script
 private EnemyController theEnemy;
 
 private int score;
 private int enemyCount;
 private float gameTimer;
 private bool gameOver;
 private int totalScore;
 
 void Start () {
 Time.timeScale = 1;
 
 thePlayer.OnHitEnemy += OnGameOver;
 thePlayer.OnKillEnemy += OnKillEnemy;
 
 scoreText.enabled = true;
 gameOverText.enabled = false;
 
 enemyCount = enemyGroup.GetComponentsInChildren<EnemyController> ().Length;
 
 //this is the call for score
 theEnemy = FindObjectOfType<EnemyController> ();
 
 }
 void Update () {
 if (gameOver) 
 {
 if (Input.GetKeyDown ("r")) 
 {
 SceneManager.LoadScene (SceneManager.GetActiveScene ().name);
 }
 
 return;
 }
 
 scoreText.text = "Score: " + totalScore;
 }
 
 void OnKillEnemy()
 {
 //adds score from call above
 this.totalScore += theEnemy.score;
 enemyCount--;
 
 if (enemyCount == 0) 
 {
 OnGameOver ();
 }
 }
 void OnGameOver()
 {
 gameOver = true;
 
 scoreText.enabled = false;
 gameOverText.enabled = true;
 
 if(enemyCount != 0)
 {
 gameOverText.text = "Game Over!\nScore: " + totalScore + "\nPress R to Restart";
 } else 
 {
 gameOverText.text = "You Win!!\nScore: " + totalScore + "\nPress R to Restart";
 }
 
 Time.timeScale = 0;
 }
 
 }