I have a new variant of sideboard with 2 led headers and a slightly changed pinout. I will update with the pinout I find.

So far, a lot of the pins line up for the sensors and battery meter pins. One notable difference is that this board is fed +36V instead of +15V, so the LEDs are most likely a different voltage config. There is also 3 colors in the front lights, so they are potentially RGB. will update!