So I’ve managed to get the fridge and aux wiring done since I’ve installed the dual battery system.
I ran 6B&S twin-core to the cargo area with a 6-fuse dist block, ready for rear work lights, LED strips, and future camper trailer connector.
I also ran the Engel panel-base wiring kit the entire way. It’s about 10awg and ideal for the fridge. I pulled the Engel OPAN base apart and mounted the sockets in the FJ drivers-side rear light plastic cover, out of the way of the Drifta Drawers which are on the way.