I haven't tried yet.
I riveted that rear loop on there to use for the middle strap on a bikini top, but I haven't put the retainer on and checked to see what happens. I also haven't tried putting the softtop up yet to make sure everything still works.
I'm kinda scared to, but I really think everything will work.
The only thing I see with the bikini or safari top is that the middle strap and buckle thing are going to be way too long so I'll have to figure out some other plan.