Awning attachment points. I bought my rig used looking to add sweat equity and make it my own. Had a wallpaper peel in the bathroom near the ceiling so when I got it home I caulked roofline and normal entry points. Next rainy time I checked the wall and leak still there. Started sleuthing around and finally figured out my rear awning bottom bracket was allowing water infiltration that was wicking UP from the bottom. Sealed it and caulked the heck out of it. ANY break in the skin or seam can allow water in and water does some wierd stuff, and goes where it wants.