How do you replace a convertible latch assembly??

The right side latch on my 1991 Vert broke. The handle still moves but it seperated from the J hook assembly.

I think I can repair the one I have but if not, it will need to be replaced.

I see a large allen head bolt in the frame, is that all that is holding the assembly in? If not, please tell me how to remove it.

Thanks in advance.

Somebody must know how to do this.