Control Panel on top of the fridge before modification.

Note: The brown wires enclosed by the grey covering is not a mains supply,  but a manufacturers convenient cable used to supply the 12Volts from the red switch to the fridge 12Volt Heater.  The red switch is located to the left of the picture with  brown and white cable feeds.

The coach builder has dangerously used two black wires  coming off the mains three block connector, so do not confuse them. One is at 250Volts AC and the other is mains neutral. Also the switched connectors from mains are bare. I took the opportunity to sleeve them during the modification.