General topics » R1200RS 12v sockets

The socket on the side panel is controlled by the CANBUS and is switched off with the ignition. You need a special charger to wake up the socket. BMW will sell you one but certain models of Optimate are canbus compatible. This socket has a 5A limit and the canbus will turn it off if you exceed the current. It's actually quite convenient for heated clothing as long as it is like Keis gear and runs on a low current.

The black/orange lead is not standard. I do not recognise the brand but it looks like a fly lead that is probably connected to the battery either for charging or to power an accessory like a tyre pump, heated clothing etc. Do you have a multimeter or bulb tester to see if it has 12V as I suspect?

The battery is under that metal lump, accessed via a cover on the same side of the bike as the accessory socket. You could trace the lead back to there. Note, the positive terminal is hidden so there is a red terminal that provides a remote post to use for accessories and jump starting.

If the lead is directly connected to the battery then you could adapt it for you oximiser. It is perfectly safe to use a charger direct to the battery, as long as it is suitable for the AGM type of battery and the relatively low Ah for motorcycles.