Here's a pic of the striker from a Bestop Tigertop on my old CJ5.
This Jeep had a 'glass tub with a thin lip, so that is why you see the piece of black steel reinforcement bolted to the lip with hex bolts below the striker.
BTW, you and your buddy will find much more info on the '72 at www.earlycj5.net/forums
Specifically, the '72 - '75 info and discussions will be in the Intermediates forum. Use the search to find older discussions, or post new questions.