Looks like a good plan to me, I did much the same
Fiddled around with vehicle solar today, still waiting on mailorder parts. Been using powerwerx.com for Anderson Power Pole (APP) connectors and other electrical connection tidbits. I got this bargain used folding panel kit last year and have been (very slowly) working to integrate it with my...
www.expeditionportal.com
My rooftop solar has been 'temporarily' wired for over a year. Still need the proper bulkhead connector and routing thru my roof rack footing into the ceiling, down the D pillas and into my rear power module where I have the PWC controller installed.
My rooftop solar panel is a folding / portable panel kit, which I built a custom locking frame for on the roof deck. But I've also made provision for setting the panel on the ground far from the vehicle, presuming I can find a shady spot to park the vehicle in the desert southwest. In which case I use a long tether cable and jack into a PP15 on the rear face of my power module.
So as seen in the above pic, I've got a variety of cabling / connection options to support different configurations. The panel itself originally had the PWC mounted on the back side of the panel's tilting leg framing and was wired with SAE connections. So I have the shorter SAE to PP plugged into the panel and the long lead with PP15 connectors on both ends running back and down along my liftgate and into the power box . All I have to do is unlock the roof frame and take the panel down and set it within 30' of the vehicle.
eta I've got room on my roof, what I'd like to do is re-make my roof mount and have a permanently mounted panel forward of existing panel and keep the rear folding panel at the rear, relocatable. but I have to find a fixed panel that's <44" long. I already have a 'Y' connector (PP15s) on the input of the PWC. As well as a newer PWC