Driver's side door jamb switch is a 3-pole grounding switch. one for the dome lamp circuit, one for the ign. switch lamp & lights on buzzer, and one for the key in the switch buzzer. The passenger side jamb switch is a two -pole pin switch with one circuit for the dome lamp and the other for the ign. switch lamp/lights on buzzer.
The lights on buzzer main harness lead is roughly right above where the radio is mounted. A short two-wire harness would plug into this lead and run towards the glove box where the lights-on buzzer would be mounted to the dash frame between the ash tray and grove box if so equipped.