I've just fitted a towbar from (Towbars Direct), and included a bypass relay. The fitting was fun, but not as bad as I expected. My issue is the wiring. I have the 7 pin version. I'm looking to connect to the wiring loom on the inside of the near-side boot space. Can anyone help with the colouring of the existing cables, please? Can someone tell me what the thick yellow cable is (radio ariel?) And the real bane of my life right now: how do I run a power line back there so I don't get bulb failure warnings? (some specifics of this would be greatly received). I did tow a small trailer with it and was advised that because it didn't obscure the view of my car lights and is plastered in high vis reflective stickers and I have a numberplate on the trailer - I wouldn't need a light-board. This was not from Plod, so I'm a tad wary of this info, but needed to shift some stuff very urgently. I have a 2006 1.6 Altea (not XL).