Relocated Overhead Light Switch - Rear Sofa
The switch for the overhead lights over the rear sofa in our unit is located on the underside of the overhead cabinets. Besides the fact the switch is black in color and on the underside of a dark cabinet, it is also fairly high up. Val just about has to climb up on the couch just to turn the lights on.
Working on a hunch that there was probably a 12V line running up to power the overhead lights and the two wall sconces, I pulled the AC outlet out on the door side of the couch, dug around in the insulation and sure enough found a single low voltage wire run heading up overhead. There was hardly any slack in the wire, so I couldn't really test it and just worked on faith.
I cut a hole above the AC outlet (no AC wiring heading up above) where I wanted to mount a switch. I separated the two wires by cutting down the middle with a knife and then cut one of the wires. I verified at that point that the wiring fed both wall sconces and the overhead lights in one circuit. I wired the switch inline with the wire I cut and verified it worked. Essentially, it serves as a cut-off for all three lighting areas (two wall sconces and the overhead lights).
With the switch turned on, all the lights can be operated individually as normal. Turn the switch off and all the lights go off. I didn't want to get fancy and pull a bunch of wire and install a three gang switch. This solution is good enough since we primarily just use the overhead lights.