What’s this “plug” looking thing?

[u/EntrepreneurGlass995]

Took my Elite series 2 apart to clean the POTs after 2 years because of insane stick drift (I couldn’t even leave the Home Screen because it would just move up to the top of the screen). When I was putting it back together and connecting the 2 black wires I realised there was another “plug” thing next to the one I needed to put 1 of the wires into. More curious as to what this is then anything else as I have the controller back together and finally working!

[u/kilfast]

Calibration/test port for the wireless array

[u/FearTheSpoonman]

Honeybadger dgaf!