Sorry no help whatsoever. I don't know which make or model of caravan or fridge you are trying to install, a picture of a fist full of coloured wires doesn't tell me anything. I don't have a wiring diagram for your caravan. Being remote from the project I cant follow what you have done,.The best I can suggest is for you to follow the fridge manufacturer's installation instructions, and the caravan manufacturer's wiring diagrams. Or to seek the hands on assistance of a caravan techie such as those of the Approved Workshop Scheme (AWS).