Back of a Dometic RM 46C, which is the same control system as a Dometic RM 36A (in my 1972 Alaskan camper).
Red arrows point to the thin copper tubes (They are not wires) coming out of the electric (right) and gas (far left) control thermostats. They are very fragile. They run up the back of the fridge and through a hole in the back to be mounted inside the fridge food storage area. They are sealed, so if broken they will not send the proper temperature to the thermostats.
