How, meetoo,

All sounds good but make sure you use good size cable all through the system so you get full current all the way though. You want have any problems then. I'm sure you probably know that anyway.

I had to rewire the Avan Camper I had and used 6B&S all over then, I think for memory, 6mm to the 12v sockets and fridge. Worked a treat, for me.

Hope it all goes well for you.