How do you get the ball back on after you put the lip ring in?

not all rings with balls have to screw on, it depends what typre you're talking about some times i get the confusion when some wank stain calls a stud a ring, guessing that its a ring, its not always a screw on ring, my lip ring you clip the ball in, there is a hole running through the ball and out the other side and you put one side of the hole on one side of the ring and clip in the other side. hope this helped, next time ask the person who sells it.