I just received a response from Nucamp on #2. The wiring for the Nashone plug should be reached by removing the speaker in the galley on the far right as you face the galley. That speaker is behind the vicinity of the Crane heater.
I did something similar. I'd replaced my T@g's doghouse with a 5' wide truck box, so i mounted a Rotopax mount on each end of it, sporting a 2-gal fuel pack on one side and a 2-gal water pack on the other.
I turned the fan on full blast and some lights but it didn’t come out of float mode.
We’re camping for four days starting tomorrow so I’m charging the battery to full using shore power. I’ll start troubleshooting again when we get back and the battery has depleted.
A SAE plug is polarity neutral. For the T@G they refered to it as a "Zamp" specific connector. (Zamp is a brand name). Nucamp may have installed per Zamp specifications. Why it was not a standard install is not too important. One can also get a SAE polarity adapter. You will likely need one anyways. Posted below is my current T@G SAE connector. As you will note the positive is female and best protected from accidential sort circuit. (This plug is directly wired to the T@G battery) All of the solar equipment that I have purchased (5 solar panels, 2 battery chargers require no polarity adapter since I reversed what T@G shipped with.
Bottom line, I have no idea how the connector was installed on your T@G. Best know what it is by checking and I would suggest marking it so mistakes can be minimized.
He reversed it as I did on mine because the polarity of the cable from his Renogy solar panel was opposite the polarity of that plug. There were two choices: purchase an adapter that would reverse the connections before plugging them into the receptacle on the side of the battery box or just reverse them at the battery. One was cheaper and easier than the other. I hope you have a basic understanding of DC electricity and a voltmeter before you start down the solar path. Checking for correct polarity is always going to be an issue if you're dealing with multiple manufacturers.
I finished the cover for the bright red eye catcher... and even managed to get some bungee cordage to cinch up the bottom of what is essentially a rectangular bag with holes in the side for the mounting/locking bracket. Getting ready for another cross country journey!
Quick update concerning changing the battery terminal connection cables from original battery to Lithium Battery. I did not need to change terminal connections. My original and replacement lead acid batteries had both the standard common SAE terminal posts as well as 3/8" threaded steel terminals. My T@G connects to the threaded terminals, before and after changeover to a lithium battery.
You may have noticed that a new post remains highlighted and the “New” indicator is persistent following reading of a post. Vanilla is aware and they are working on a fix.