Problem with raycasting towards mouse

I made a grappling hook that shoots out a ray and attaches to a rigidbody. The problem is the ray is always shot upwards, instead of towards the mouse.

 public bool grapple = false;
     DistanceJoint2D joint;
     Vector3 targetPos;
     RaycastHit2D hit;
     public float distance = 10f;
     public LayerMask mask;
 
     void Start()
     {
         joint = GetComponent<DistanceJoint2D>();
         joint.enabled = false;
 
     }
 
     void Update()
     {
         if (Input.GetButtonDown("Grapple") && grapple == true)
         {
             targetPos = Camera.main.ScreenToWorldPoint(Input.mousePosition);
             hit = Physics2D.Raycast(transform.position, targetPos - transform.position, distance, mask);
             Debug.DrawRay(transform.position, targetPos - transform.position);
 
             if (hit.collider != null && hit.collider.gameObject.GetComponent<Rigidbody2D>())
             {
                 joint.enabled = true;
                 Vector2 connectPoint = hit.point - new Vector2(hit.collider.transform.position.x, hit.collider.transform.position.y);
                 connectPoint.x = connectPoint.x / hit.collider.transform.localScale.x;
                 connectPoint.y = connectPoint.y / hit.collider.transform.localScale.y;
                 joint.connectedAnchor = connectPoint;
                 joint.connectedBody = hit.collider.gameObject.GetComponent<Rigidbody2D>();
                 joint.distance = Vector2.Distance(transform.position, hit.point);
             }
         }
 
         if (Input.GetButtonUp("Grapple"))
         {
             joint.enabled = false;
         }
     }