Camera turns to the front when reversing car

Hello!

When I started making my game back in 2014 I followed a video tutorial and created a camera script with the help of that. When reversing though, the camera turns to the front of the car and I don't like that. How would I get the camera to always look at the back of the car?

 using UnityEngine;
 using System.Collections;
 
 public class CarCameraScript : MonoBehaviour
 {
     
         public Transform car;
         public float distance = 6.4f;
         public float height = 1.4f;
         public float rotationDamping = 3.0f;
         public float heightDamping = 10.0f;
         public float zoomRatio = 0.5f;
         public float defaultFOV = 60f;
         private Vector3 rotationVector;
     
         void LateUpdate ()
         {
                 float wantedAngle = rotationVector.y;
                 float wantedHeight = car.position.y + height;
                 float myAngle = transform.eulerAngles.y;
                 float myHeight = transform.position.y;
         
                 myAngle = Mathf.LerpAngle (myAngle, wantedAngle, rotationDamping * Time.deltaTime);
                 myHeight = Mathf.Lerp (myHeight, wantedHeight, heightDamping * Time.deltaTime);
         
                 Quaternion currentRotation = Quaternion.Euler (0, myAngle, 0);
                 transform.position = car.position;
                 transform.position -= currentRotation * Vector3.forward * distance;
                 Vector3 temp = transform.position; //temporary variable so Unity doesn't complain
                 temp.y = myHeight;
                 transform.position = temp;
                 transform.LookAt (car);
         }
     
         void FixedUpdate ()
         {
                 Vector3 localVelocity = car.InverseTransformDirection (car.rigidbody.velocity);
                 if (localVelocity.z < -0.5f) {
                         Vector3 temp = rotationVector; //because temporary variables seem to be removed after a closing bracket "}" we can use the same variable name multiple times.
                         temp.y = car.eulerAngles.y + 180;
                         rotationVector = temp;
                 } else {
                         Vector3 temp = rotationVector;
                         temp.y = car.eulerAngles.y;
                         rotationVector = temp;
                 }
                 float acc = car.rigidbody.velocity.magnitude;
                 camera.fieldOfView = defaultFOV + acc * zoomRatio * Time.deltaTime;  //he removed * Time.deltaTime but it works better if you leave it like this.
         }
 
 }