I have a post here (click) that shows the simple mod to the battery to make it have the four terminals and fit the board.
Excellent post about the batteries. What gauge is the copper wire you used. I'm not sure what my PCB looks like yet.
I'm busy doing the SRT-6 wing fix after reading your post on sealing it up. I picked up some Duck Rope Caulk tonight at Wally World and some EPDM weather stripping.
https://www.crossfireforum.org/forum...ing-plate.html