G Class solar prep

I have 2020 G25 that is ‘solar prepped’. Does anyone know what that means exactly? I see what looks like a junction box on the roof near the rear and some wires hanging down in my outside front closet. Is that the extent of it. I see [enomar]asking about a wiring diagram but no replies

Yep, the prep is just the wiring. Some models it’s just a path for the wiring.