what a mess

[MBX5's]

well things are going pretty good on the soldering end and all the proper connections have been made......getting ready to do a final instal and get everything wired up....I happen to notice a smart stop in a box of parts. When I looked into it, it appears he bought the wrong one. it reads 4 Cell. The battery he has is a MaxAmps 3S 5000 11.1. so Im guessing I cant use this smart stop.....even tho this stuff was all free....it's given me a headache,