A couple of updates to ours:
1- Electrical - I dug around and there is no panel or fuses etc, but GoalZero got back to me and said I don't need any of that. The wiring is all pretty simple. Seems like most of the runs are 16 AWG and tucked behind the plywood corner pieces or nicely hidden and wrapped in that flexible plastic cover.
2- The National Luna fridge is awesome and the simple Curt D-Loop mounts with a single strap on either side has worked great with the fridge. It doesn't move around when driving on super potholed bad roads. I do have an anti-slip mat under it that helps I think.
3- The Airhead Toilet is fully installed. Its so freaking sweet to use. No chemicals or mess and its a perfect fit with the larger 2gal liquid bottle too. I routed the vent hosing out the top with a JR Products mushroom vent and Mangus Bond 75AM sealant/adhesive. The fan wires in nicely a half in away to the existing wiring too. I use hole saws to cut into the plywood cabinetry so as to route the housing in a hidden way. The ceiling hole was done with a 2.5in hole saw as well and was really easy. I used a custom switch for the vent fan so I could turn it off if I want.
4- I'm wiring in the Sirroco II fan this week and will use some thumbscrews to mount it to the upper brackets on passenger side. It'll give me some flexibility in figuring out where I want it. Wiring it into the 12v run that is below the fireplace. There is wiring already there for the small fan on the heater. Using 18 AWG and some basic crimp connectors.