I just got a PM from a member here, which made me realize I never closed this thread out.
Upon removing the sofa and trimming back the inner skin, just a bit, on the perimeter of the battery box, I could see the screws (or lack thereof) attaching the outer skin to the Battery door cast frame. There weren't many screws, and a couple had the heads snapped off. I drilled several holes through the inner skin and the flange of the frame and fastened with stainless self tapping screws. I added 3 - 4 screws on both sides and the top of the frame. The bottom is inaccessible, and probably unnecessary.
I removed the old sealer around the perimeter on the outside and reapplied Parbond.
After awhile, I still saw some minor small gaps develop while WD is applied. I would recommend (and I will do, one of these days) re-applying Parbond, and allowing to cure, WITH WD APPLIED. This will fill the small void and just hold the skin in that "stressed" position when WD is not applied.
"If the women don't find you handsome, they should at least find you handy." - Red Green