I had a friend hardwire my RD.
Instead of running a wire from the kick panel, he dropped down the interior light assemble and tapped into a wire in that area. I believe the wire was sun roof related. I had him install an 1 amp inline fuse just in case he tapped into a circuit that had a bit too much amperage.
Anyways, it seems to work. My RD turns on/off with the ignition.