They are assembled by tinning the cell ends andputting iron (very thin tip) between cells, and then quickly pullout iron letting cells touch while solder is still liquid.
Mate, I think there gonna be a BEEEEOtch to seperate.
You will probably need to get a tip for your iron and grind it thin so it can be eased between the cells.
Might be easier to ask the boat guys how they disassemble them.
I think there may also be a couple of guys in the mini thread that do their stick packs this way, maybe they can help.