Aim assist

how do I add aim assist to my game. I am using danis grappling gun but it can be quite hard to grapple the objects. here is my look scripts:

  xRotation -= mouseY;
 
         xRotation = Mathf.Clamp(xRotation, -85, 85);
 
         transform.localRotation = Quaternion.Euler(xRotation, 0, 0);
         playerBody.Rotate(Vector3.up * mouseX);

I would like a slight lock on to the grappleable objects but not so much that its auto aim.