Align camera and turret aim

Hi

I have this tank game im working on but I have a little problem, I need to align the turret rotation with the camera so the tank shoots where the camera is pointing but only on the Y axis (Camera's X axis), I tried to do this by changing the turret's rotation but you cant change just the rotation of one axis without affecting the other two axes, even if you add turret's rotation back in the other two axes it doesnt look right...

Any idea how can I do this properly?

Here is the Camera code Im using:

 using UnityEngine;
 using System.Collections;
 
 public class CameraScript : MonoBehaviour {
     public GameObject Player = null;
     public Vector3 OffSet;
     public int CameraIndex = 0;
 
 
 
     private OnlineTankController _Controller;
     float distance = 10f;
 
     float xSpeed = 40f;
     float ySpeed = 120f;
     public float yMinLimit = -20.0f;
     public float yMaxLimit = 80.0f;
     private float x = 0f;
     private float y = 0f;
     // Use this for initialization
 
     void Awake(){
         Vector3 angles = transform.eulerAngles;
         x = angles.x;
         y = angles.y;
 
         if (GetComponent<Rigidbody>() != null){
             rigidbody.freezeRotation = true;
         }
     }
     void Start() {
         _Controller = Player.GetComponent<OnlineTankController>();
         transform.rotation = _Controller.transform.rotation;
 
     }
     // Update is called once per frame
     void LateUpdate () {
         switch (CameraIndex){
             case 0:
                 distance = 10;
                 break;
             case 1:
                 distance = 15;
                 break;
             case 2:
                 distance = 20;
                 break;
         }
 
         if (Input.GetButtonDown("Camera")) {
             CameraIndex += 1;
 
 
         }
 
         if (CameraIndex >= 3){
             CameraIndex = 0;
 
         } 
         
         
         if (Player != null){
 
 
             x += Input.GetAxis("TurretX") * xSpeed * 0.02f;
             y -= (float)(-Input.GetAxis("TurretY") * ySpeed * 0.02f);
 
             y = ClampAngle(y, yMinLimit, yMaxLimit);
 
             Quaternion rotation = Quaternion.Euler(y, x, 0);
             Quaternion Turretion = Quaternion.Euler(Player.transform.rotation.eulerAngles.x, x, Player.transform.rotation.eulerAngles.z);
             Vector3 position = rotation * new Vector3(0.0f, 2, -distance) + Player.transform.position;
 
             transform.rotation = rotation;
             //_Controller.Turret.transform.Rotate(0,Input.GetAxis("TurretX")*10,0);
             _Controller.Turret.transform.rotation = Turretion;
             transform.position = position;
             
         }
 
     }
     static float ClampAngle(float angle, float min,float max){
         if (angle < -360)
             angle += 360;
         if (angle > 360)
             angle -= 360;
         return Mathf.Clamp(angle, min, max);
     }
 }