Well, I'm done with checking out the fridge, runs on propane, ac, and 12v, did the modification to the air pump, cleaned up the rust that was behind the fridge and coated it with POR 15 and replaced the old insulation. So now it's time to reinstall it. However, on the back of the thermostat is a spade lug that looks like it would connect to a ground-I don't remember pulling anything off that lug, and I don't see anything that would connect to it. It is evenly discolored all over, I'm thinking if there were a female connector on it it would be lightly scratched-am I correct that nothing connects to it?   Thanks,  Jeff