Temporarily mounted all but one remote avionics box on avionics tray that will be in front of instrument panel. I made standoff bushings to mount the GMA-245R audio panel box on top of the GTR-20 Comm 2 box. The 2nd backup battery will be mounted directly below the upper backup battery using similar standoff bushings. The main EarthX battery will be mounted on the bottom of the tray to allow for easy removal from the rear, if needed.