The Skyview kit that comes with the RV-12 has a USB pigtail, which, as noted, goes under the instrument shelf - a very poor location IMHO.
I relocated it to the front panel above the Ignition Module on the LH side. I'm VERY glad I did as I use it every day. I use the thumbdrive to upload my flight plans, download my flight data after every flight, as well as upload Nav and Terrain database updates monthly, Firmware updates - periodically, and also to dowload and save my SV settings. This allows me to quickly restore my system should the unit go bad (happened to me several times.)
Bob Bogash
RV-12
N737G