Drivers side is different color and powers come from battery junction box under the hood. You can check the other inline connectors for the circuit you need but may have to get power from driver seat. This is the driver side.
Yes each C is the in-line connector and then pin(terminal). Yes you could use the power from driver seat due to both seats not being adjusted at the same time
When you look under passenger seat wire connector there needs to be a white/red trace wire on floor harness and a violet/red wire in seat harness for it to work.
Quit teasing us with this design and let us know when we can buy it. Much better than ring design puck that has to be removed whereas this can stay in place.