Yes, I didn't word my question quite right. You are correct - fasteners dictate location. What I really wanted was some confirmation that these are the type used on original cars and they all did, indeed, use a riv nut and not just a sheet metal screw. I didn't want to drill out holes for a riv nut and learn otherwise.
The AMK kit has all threaded fasteners, so I guess that answers my question too - riv nuts used top and bottom. I got some additional confirmation on all this on the Boss Forum so I am good now and I can figure it out from here. Thanks for your response and the offer of the instructions.