Question about seats

For the front seat. If the seat back is hinged to fold forward it is for a 2 door car ( simple enough ). For the rear seat, that seat bottom will be shaped different. It's outer corners are cut away to expose more floor at the door way.
The wires under the seat apear to be the 74 only seatbelt interlock switch and harness.
A weight in the seat ativaites the switch which prevents engine start until seatbelts are
buckled.