About to get a caravan with 13 pin connection. In 2014 Outback how much prewiring exists to the rear for these pins? 9 - continuous 12v. 10 - fridge 12v from ignition. 11 - earth for fridge. 13 - earth for continuous 12v. Or do I have to run cables from the engine bay for these? I’m thinking I might do without these as A: I can monitor the charge on my 2 leisure batteries and avoid need to draw 12v from car ( I might get solar in future anyway) and B: run my fridge on gas, it will be approved for gas while travelling. Can someone show me where the trailer connections are in the back, what cover to remove?