I discovered that port side bottom edge where there is a battery hatch of that plywood laminate has broken up from accumulated rain water. I just replaced the walls of the head and it was bugger getting the back wall of the head that I made back in. It was like the boat was built around the panel. It is held in a molded groove. Do you know if this is the case for the battery panel? I was finishing up when I made this discovery and had to head out to make the 2 hr drive back to the house before curfew, so didn't get time to explore this but it looked like maybe another it is fixed in another molded groove.