How to select which camera i want to use.

Sorry for my english I have this script and i want to place this script to my car and select which camera i want to use

 using UnityEngine;
 using System.Collections;
 
 public class CarCamera2 : MonoBehaviour
 {
     public Transform target;
     public float distance = 3.0f;
     public float height = 3.0f;
     public float damping = 5.0f;
     public bool smoothRotation = true;
     public bool followBehind = true;
     public float rotationDamping = 10.0f;
 
     void FixedUpdate()
     {
         Vector3 wantedPosition;
         if (followBehind)
             wantedPosition = target.TransformPoint(0, height, -distance);
         else
             wantedPosition = target.TransformPoint(0, height, distance);
 
         transform.position = Vector3.Lerp(transform.position, wantedPosition, Time.deltaTime * damping);
 
         if (smoothRotation)
         {
             Quaternion wantedRotation = Quaternion.LookRotation(target.position - transform.position, target.up);
             transform.rotation = Quaternion.Slerp(transform.rotation, wantedRotation, Time.deltaTime * rotationDamping);
         }
         else transform.LookAt(target, target.up);
     }
 }