2019 view. Can not tell from wiring diagrams where the battery wires on the back of the Zamp unit tie into the batteries. Wished they provided schematics.
I can find the solar panels, the controller wiring and the battery wiring, but unless I missed it I don't see exactly where the wiring from the solar charge controller attach to the batteries.
This diagram does show the wire colors to the batteries. I think it says it runs to the chassis electrical panel. On my totally different motorhome, they run directly to the battery posts.
They may tie in under the passenger seat. If your panel on side of seat has a breaker that says Solar, then that wire is tied to battery in that method. The chassis and coach battery connections on the Vita/Porto are located there.