Good point HS, yeah no super easy way; either a custom harness or a blue wire job. Kk2.2 should have a jumper to link the power circuits.
[edit: I attached an image of the required power harness. It would be immensely helpful to newbs if HK carried them. Experts will know how to solder from the back (blue wire). I'm sure a picture showing how it's done will pop up soon.