What the heck is this???

OK, my next question. If this is the seatbelt bypass switch as indicated in the chassis electrical picture, would not having the seatbelts installed at all keep the car from starting with the key?? Could this magic red button somehow make this car start with the key? It will turn over and start with the key on and bumping the starter relay. ARRGHHH, stupid government regulations...circa 1974. Oh and my mistake, I think this Duster I have IS a 74, sorry!!! Geof