Originally Posted by DustyRoads
If I can get out to my trailer I will measure for you. Without looking it is in middle of the wall below cable and power connection. About 12" down. But I will get you measurements. I need to refresh the peppermint oil I use for winter storage.
I went out there is a cross member starting 20" from the ceiling, looks to be 1" thick.. It goes from the outside wall to the pocket door. You can feel it by pressing on the wall panel. I think there is a vent pipe in that wall behind the board, but not 100% sure.
Hopefully if the photo uploads from my phone you can see it along the bottom way up in. I took this by taking out the drawer in the bathroom above toilet. You maybe able to see from storage in bedroom.