Hi.

I wanted to do the same and after getting quoted 90$ to have someone do it, I decided to do it myself. I ran the extensions out from the unused 12 volt adapter and pulled them out by using an 18 inch wire tie. Once out of the trunk I pulled them up to the small grill under the mirror on the top left and terminated them on a Bluetooth reciever that has Aux Audio and USB. That solved my problem. Let me know if you need better info