Appoligies if this has been asked before but I could not find the answer doing a search. I have just bought a XChallenge for green lanning and whilst removing the indicators I noticed a Black square plug situated right hand side (as you sit on) rear. It has a locking wire typical of BMW and just wondered what it was. I initial thought it might be the dyinostic plug in point similar to the GS's. Proberbly wrong so please let me know what it is. Thanks all