I had the same difficulty. if you look under the dinette at the storage cabinet where all the electrical runs, there are screws on the bottom and top (3) white, there are also screws on the inside through the small access hatches, all connecting the covering to the wiring that has been run to the buss bars. I installed my shunt here since it has direct battery connection and my solar controler will mount on the outside also, near the old crappy controler AS installed. There are hidden screws that hold these two cabinets together, the wood just needs to be pryed off. one on top and bottom. It was a pain figuring this out, unfortunately AS doesnt make it easy to take apart cabinets, it usually is quite a puzzle. Obviously assembled in a wharehouse then put together in the trailer. Keep that in mind and start undoing screws, a cordless driver is almost required. definitely makes things much easier. Hope this gets you started.