1988 jeepcherokee rear hatch balljoint help

hay guys i realize this forum is for xj and such but i figure one of you might be able to help me... on a desert trip a while back me mom was getting crazy and hit a bump at like 40 mph and we herd a snap i look back and the rear hatch strut was hanging down.. the ball joint that holds up the strut ripped off halfway...

i was wondering if any one knew for sure
1.how the ball joint (technical term for this part: ball stud) is fastened for a 1988 jeep Cherokee 4 door 4.0 ltr
2 how to remove and put a new one on?

'thanks for any help you can provide'

They screw into a nut that is fastened into the body. If the ball broke, you should be able to drill/extract the remaining piece. If it completely tore out (as mine did in my '88) you can remove the trim and drill a hole and put a nut/washer on the inside of the body to secure the new one.