Image Rotate Gallery Snap

Hi guys.

I have Image Rotate Gallery in my game.

I have a Script for my Image Rotate Gallery

 public int speed;
     public float friction;
     public float lerpSpeed;
     private float xDeg =0f;
     private Quaternion fromRotation;
     private Quaternion toRotation;
 //    public GUIText guiText;
     
     void FixedUpdate ()
     { 
             if (Input.GetMouseButton (0)) 
         
                 RotateTransform (Input.GetAxis("Mouse X"),0f);
             else 
                 RotateTransform (0f, 0f);
     }
 
     void RotateTransform (float xNum, float yNum)
     { 
         xDeg -= xNum * speed * friction;      
         fromRotation = transform.rotation; 
         toRotation = Quaternion.Euler(0,xDeg,0); 
         transform.rotation = Quaternion.Lerp(fromRotation,toRotation,Time.deltaTime * lerpSpeed); 
     }
 }

And this is my Script for my Snap. this is "Image Snap"

 void OnTriggerStay(Collider Category)
     {
         if(Category.gameObject.tag ==     "P1")
         {
             CarouselRotate  focus = GameObject.Find("Carousel").GetComponent<CarouselRotate>();
 
 //rotate local the carousel here base on the image category that hit in the collider
 //
 
 }

my problem is when the the image in the category is collide to "Image Snap". i want to rotate the "image rotate gallery" to center the current image that collide in the "Image Snap"