No pictures, which seat do you need to know how to mount, the seat back or bottom?
Seat back, there are two brackets welded to the floor pan were is slopes up and there are two screw holes (one per side) there are two U shaped hooks on the seat frame, those bolt to the brackets. The seat can only go in one way.
Seat bottom, there are two brackets on the floor pan, one per side, that have a slot that the seat frame bottom slide into, you need to force it a little to get it to catch.