So, I have a pair of old Bride seats and I'm trying to figure out how to mount them. Theyre tube-frame and fixed back. On the bottom there are four nuts welded to the inside of the seat frame, facing down. Are all Bride seats like this? Would anybody have any idea what sliders I need to get or know of a simple way to mount these to s13/s14 sliders? I'll take some pictures later if you guys need them. Thanks! -Shane