My filter in the 31FK is in a similar compartment but at least it is near the access panel and not way back inside the compartment. To make it easier to get to, I replaced
the screws with Velcro and added grab handles.
The filter housing was also wrapped with flexible electrical conduit making it nigh on impossible to unscrew. Our dealer relocated that wiring as a warranty fix which I much appreciated.
And Jayco also left several large holes for piping, wiring and hoses throughout my Greyhawk. Open the wooden panel beneath your bed and look into the electrical component compartment. I expect you'll see the ground through the holes. I filled all I could find with spray foam insulation to stop drafts and keep out mice.