galley vent fan

[LHall]

Does anyone by chance have a wiring diagram for the exhaust vent fan and switch for the 60s era coaches? The switch is a simple toggle switch with three settings. Shore power, Off and battery power setting.

PO unwired everything and left disconnected. The fan motor works, but I would like to re attach wires and test the system. I am looking for the wiring config for the switch.

I have two green wires, 1 black dc wire, and two black Ac wires.

Any help is greatly appreciated. I checked other posts and could not find this information.

Thanks
Louis