"Solar ready" generally means a MC4 solar jack is installed on the roof, there may be an additional SAE automotive style plug installed in a service bay for "solar on the side" portable panels. Usually wiring is ran from the roof MC4 to where they want you to mount a go power controller, usually a sticker is applied at that location. The wiring at the controller location sticker is usually but not always cut and capped, and continues on to distribution panel closer to the batteries. From what I have read even similar models can be wired differently. There likely is a schematic / label near that area ->similar to the pic of mine below<- showing the wiring configuration and solar lead, it may be behind and access panel. Hopefully someone with your model can give more detailed info.
My findings on my 5er.- Wires were cut and capped behind the go power label. My ground wire was terminated elsewhere, I never did find it in my basement. My "solar on the side" SAE connector (that I don't use) isn't connected to anything, just 2' of wires dangling off of the back of it.
If you mount the solar controller closer to your batteries it would be slightly more efficient.
2020 Pinnacle 32rlts
640 watts solar, 300AH lithium
2020 High Country Duramax 3500
Ms says I'm full of useless knowledge and other stuff...