Well finally got off my ass and connected the Traxide battery isolater. mounted the 50 amp plug under the trailer plug from the bottom of bracket, drilled and tapped the holes and used M4 bolts, ground the bolts that were sticking up and painted it black, mounted trailer plug back in original place.

The switch and led box decided to mount that at the rear can see light if i turn head or use mirror with LH head rest folded down

20210131_124721.jpg Cable fed from the bottom and screwed from the bottom, can see LED from outside, being a 5 seater mounted the cigarette power socket in the blanking plate where one of the seat switches would have gone panel drill and die grinder helps.

Now which battery to fit and from the other posts on the site that is a big debate, checked the battery charge at plugs and it came in at 14.28 volts at idle, had one battery plus try and sell a DC/DC converter, said it was not needed due to what would be sufficient voltage at rear.