I have a battery tender cable (SAE) that I soldered some extension wires to so that it would reach from one of the "always on" connection on my FuzeBlock power distribution box under the seat up to the front right corner of the gas tank.
I use that cable to power the electronic gizmos in my tank bag (Starcom1, Radar Detector, Cell phone changer, etc.) while riding. When not riding I just unplug that one cable and it is then available for it's intended use (battery tending) or else to power my Slime 12V air compressor, in the event of a need for tire plugging out on the road.
Those SAE connection is pretty rugged and not as susceptible to flakiness when wet as some other connector types.