Originally Posted by
EricW
Make one of the wires coming off your esc too short to plug in to the wrong port on the battery, if it can’t reach the wrong port on the battery you can’t plug it in wrong. This is assuming all your batteries have the same port layout.
I looked into that but with a shorty pack you have a lot of options for battery placement. To facilitate those placements the wire cannot be short enough to prevent mixing the polarities.