Overcharging
OK. In that case, the diagram from post 9 will show the general scheme for your charging system.
Details that will or may differ, but not affect the concept.
Ignition circuit - when the key is on, the ignition amplifier (ECU) will draw power. There may also be a seatbelt interlock and some other gizmos. If there is an electric assit on the choke, it can also draw power when its on. I don't know the details off the top of my head.
If it was equiped with optional alternator and/or rear window defrost, wire routing will be slightly different as shown earlier in this thread.