Cheers mate.
When I was searching around for info on this one I was thinking that if I needed to run power for the trailer lights I should do it big enough for some power in the tray too.
Happy to say you can by pass the 2 looms in the front and just run a new fused supply from the battery to the relays on the genuine tow bar.
I had decent sized single core cable at home that I bought just because it was on sale a while ago.
But I didn't have enough to run power and earth from the battery, so just earthed on to the chassis.
Firstly before fitting the bar I moved the plug up higher on the bar. These GLXR bars hang so low, I can't believe they put an electrical connection as the lowest point.
New plug location.
I fitted a clear fuse holder at the battery and have a 30amp fuse in there for the moment.
Positive power supply for the trailer lights running off the back of the main supply.
Chassis earth for trailer plug and mains.
I haven't really figured out what exactly I want to do with the power in the tray yet, so just put an Anderson plug on the recovery gear box next to the fridge slide.