Solar Ready in Pass-Thru 2020 models

[mikec557]

2020 26RBSWE Travel Trailer

So beginning with the 2020 models Keystone began wiring ports on the rooftop for solar panel plug in, calling it solar Ready (aka off the grid ready). They ran wiring from the rooftop port to...? That's my mystery question, to where did they run it. You can see in one of the pics that there is a cover in the pass through that's labeled solar ready. But when I removed mine there is only a loop of Romex. I don't believe the Romex is wired to the rooftop...

Rather, it is a loop you can cut into and install a xantrex Inverter/bypass to power an 1 outlet in the bedroom, 1 in the kitchen, and 1 behind the tv. That pre-wiring too is part of the new 2020 solar Ready wiring. You can see a pic of the xantrex installed on a new 2020 I took at a dealership.

Back to the rooftop wiring mystery. It should be 2 stranded, not solid, copper wires coming down from the rooftop to a solar charge controller (SCC). You can see a zamp SCC in another of the pics I took at the same dealership.

There also needs to be another pair of stranded copper wire from the SCC to the batteries. Though I am unclear on whether or not that is part of the Keystone solar ready setup.

I hate to just cut a hole in the approximate location of the SCC in the picture and finger around inside feeling for wire, but I don't know what else to do.

There's no paperwork with the trailer, and nothing I can find online.

Does anyone have documentation on this new feature "solar ready" (not the trickle charger port outside near the tongue), or any experience installing a solar charge controller in these new 2020 solar ready rigs, or any ideas or suggestions?