70 duster question

thanks so much duster 440 i am trying to get back up lights the car was a 4 speed now it has a 904 the center wire on the neutral switch is hooked up so the car starts in neutral but the contact pins on each side are not these are for the back up lights i do not see any wires for these pins does anyone know where to run the wires that goes to the 2 pins would they come from the 3 plugs on the fire wall maybe the drivers side plug i dont have thanks