Cutting open commercial batteries! (Lift, Onean, Flite, etc.)

Has anybody found a decent plug solution to connect to the battery case, preferably waterproof ?

Whether using the native German ODU Lamtac solution… or not…

https://eu.mouser.com/ProductDetail/ODU/S11K0C-P08MFG0-5000?qs=lc2O%252BfHJPVZsoYYZLF%2F3nQ%3D%3D

See also: Lift efoil battery cases for sale - #8 by SoEFoil