Yes.
The positive supply to the auxilary power plug.
It's the one under the seat, nearside. Where you might normaly plug in a heated vest.
You may require one more Autocom part, if you use a BuMW 'smart charger' to keep the battery topped up.
If you use a 'smart charger' it tricks the bike's electrics to staying open, allowing the charger to do its stuff, without the whole electrical sytsem shutting down as normal.
Without the additional Autocom part, the bike picks up on the presence of the Autocom unit. The bike's 'brain' translates this as a problem (or at least an unwanted drain on the electrics when the bike's engine is not running) and shuts everything down again. This means the 'smart charger' will not work.
It's easy to fit the additional Autocom part. Sorry I do not have the part number to hand. Call Autocom or look on their website.
It's not a problem if you do not use a 'smart charger' or use, say, an Optimate.
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PS Another popular place to mount the Autocom box itself is above the battery, where the owner's handbook is meant to sit. Hold it in with the rubber band provided or, better still, cable tie it in. Easy. I prefer this site, using the tool space for my Kenwood bike-to-bike.
A search will turn up some pictures.
I have had mine in both places, on two 1200GS's. Over 70,000 miles and no problems.