I extended the Aux input (under the right side cover) with an audio jack extension cable that runs under the tank on the frame to the handlebars, which is tied in with the other cables etc. I plug it into my GPS with an MP3 player and listen to the music/audio directions that way using the AUX function. When I remove the GPS I fold the cable into a little loop and slide the jack under a tie wrap to hold it out of the way. Works great....

Edit.... oh I also added a power port under the riser top clamp and plug my GPS into that. But, I do have to remember to unplug it when not in use.... as it's hot and will constantly run or charge the GPS.