Roadtrek sliding door surround stability

[NeilConnect]

I have a 2017 road trek SS agile.
The sliding door has great features, including that magnetic closing screen. The upper edge of the sliding door has separated from the body a little bit, perhaps too much pull on that screen. I’d like to go in and stabilize it, and I’m looking for any experience or tribal knowledge on how to approach it.
I have the square drill bit (screwdriver) but of course I’m a little nervous going back there because the fresh/grey/black tank status panels are close by and I don’t know how that section is attached to the chassis.

Any firsthand experience in stabilizing that area would be greatly appreciated.