Given that you only connect the BMS to the main battery negative and then positive leads to each individual cell, how does a BMS calculate the individual voltage of each cell?
This may be a dumb question but in order for this to work properly, you need to make sure that "first cell positive" is the same cell that the main negative is on and then make sure each cell after that is the furthest cell (leftover that hasn't been connected) from the cell that has the main battery banks positive lead, making that cell the last one connected to the BMS?
My sincerest apologies if that explanation was more complicated than it needed to be, I hope it makes at least a little bit of sense haha