Unfortunately my boat does not have a depth gauge, heater or shower. I'm curious to see if Acc-1 & 2 are connected to anything. I won't know until I get the motor back in and the wiring hooked back up.
Sometime I will have to do a search on a homemade heater, it seems like it would be simple to make with a heater core and a blower motor.
Does anyone have a picture of the factory cigarette lighter, I'm curious what was there.