Help Question About Making Grappling Hook

Code:
private IEnumerator Attach_Coroutine()

    {

        _rope.RemoveFromSolver(null);



        Quaternion lookRot =

            Quaternion.LookRotation(_rope.transform.position - GameManager.Instance.Ball.transform.position, -Vector3.forward);

        lookRot.x = 0.0f;

        lookRot.y = 0.0f;

        _rope.transform.rotation = lookRot;



        float distanceToBallFromHandle = Vector3.Distance(GameManager.Instance.Ball.transform.position, this.transform.position);

        float distanceToBallFromRopeEnd = distanceToBallFromHandle - _rope.CalculateLength();



        float attachSpeed = GameManager.Instance.handleAttachSpeed;



        _rope.AddToSolver(null);

        while (_rope.CalculateLength() <= distanceToBallFromHandle)

        {

            _ropeCursor.ChangeLength(_rope.RestLength + attachSpeed * Time.deltaTime);

            yield return null;

        }



        _ropePinConstraints.RemoveFromSolver(null);

        ObiPinConstraintBatch pinConstraintsBatch = _rope.PinConstraints.GetFirstBatch();

        pinConstraintsBatch.AddConstraint(_rope.UsedParticles-1, GameManager.Instance.Ball.GetComponent<ObiColliderBase>(), Vector3.zero,

            Quaternion.identity, 0);

        

        _ropePinConstraints.AddToSolver(null);

        

        _isAttached = true;

    }