Riding home tonight, I looked down at the side of the bike and this wire was unplugged.
It wraps around the head tube plugged in under the tank cover on the left side, it came unplugged on the right side (I surmise also from under the tank cover)
covered in accordion type wire cover, "phone jack" type end (for lack of a better description)
Bike seems to run normally with it unplugged, I pulled over, lights all work, bike starts fine.
Any techy types own or experienced with a CBR1K know what this thing is before I start pulling shit off to see if I can find where this thing plugs in?