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).