I choose a Dynon D-6 for my back-up EFIS. I'll be feeding GPS input from my G3X GDU-370. The Dynon wiring diagram has the GPS input spliced into the Dynon serial input 9 pin D-sub which goes to the Dynon pin #22 which is used for firmware updates but states that the GPS wire must be removed during updates. How should I do this? I don't want to pull the panel apart to remove the wire. Panel switch? Maybe I am over thinking this?