crosshair unity with raycast

so i want to make a crossair for a grapplinggun in a third person game i am using a cinemachine camera

here is the grapplinggun script

 using UnityEngine;
 public class GrablinGun : MonoBehaviour
 {
     public LayerMask whatIsGrappleable;
     public Transform gunTip, camera, player;
     public float offset;
 
     private LineRenderer lr;
     private Vector3 grapplePoint;
     private float maxDistance = 100f;
     private SpringJoint joint;
 
     void Awake()
     {
         lr = GetComponent<LineRenderer>();
     }
 
     void Update()
     {
         if (Input.GetMouseButtonDown(0))
         {
             StartGrapple();
         }
         else if (Input.GetMouseButtonUp(0))
         {
             StopGrapple();
         }
     }
 
     //Called after Update
     void LateUpdate()
     {
         DrawRope();
     }
 
     /// <summary>
     /// Call whenever we want to start a grapple
     /// </summary>
     void StartGrapple()
     {
         RaycastHit hit;
         if (Physics.Raycast(camera.position + new Vector3(0, offset, 0), camera.forward, out hit, maxDistance, whatIsGrappleable))
         {
             grapplePoint = hit.point;
             joint = player.gameObject.AddComponent<SpringJoint>();
             joint.autoConfigureConnectedAnchor = false;
             joint.connectedAnchor = grapplePoint;
 
             float distanceFromPoint = Vector3.Distance(player.position, grapplePoint);
 
             //The distance grapple will try to keep from grapple point. 
             joint.maxDistance = distanceFromPoint * 0.8f;
             joint.minDistance = distanceFromPoint * 0.25f;
 
             //Adjust these values to fit your game.
             joint.spring = 4.5f;
             joint.damper = 7f;
             joint.massScale = 4.5f;
 
             lr.positionCount = 2;
             currentGrapplePosition = gunTip.position;
         }
     }
 
 
     /// <summary>
     /// Call whenever we want to stop a grapple
     /// </summary>
     void StopGrapple()
     {
         lr.positionCount = 0;
         Destroy(joint);
     }
 
     private Vector3 currentGrapplePosition;
 
     void DrawRope()
     {
         //If not grappling, don't draw rope
         if (!joint) return;
 
         currentGrapplePosition = Vector3.Lerp(currentGrapplePosition, grapplePoint, Time.deltaTime * 8f);
 
         lr.SetPosition(0, gunTip.position);
         lr.SetPosition(1, currentGrapplePosition);
     }
 
     public bool IsGrappling()
     {
         return joint != null;
     }
 
     public Vector3 GetGrapplePoint()
     {
         return grapplePoint;
     }
 }

 

then i made this for the crossair but this didnt work and al my classmates dont know how to so i came here

crossairscript here

 using System.Collections;
 using System.Collections.Generic;
 using UnityEngine;
 public class CrossAir : MonoBehaviour
 {
     public GameObject graplinGun,cam;
     private float offset;
     void Start()
     {
         offset= graplinGun.GetComponent<GrablinGun>().offset;
         transform.position  += new Vector3(0, offset, 0) ;
     }
 }

if u got a idea or know how to do this please let me know thank you