When building any harness, I need to know the battery order.
This is my test batteries connected B-^12s^6s^6s^B+
Plugs will be marked B-^blk^blue^red^B+.
Even though they are tested here, it’s up to you to test voltages at jst-xh plugs to bms before connecting the bms end. It is one last check to make sure we understand each other.