One of my projects this weekend was to get my Nuvi installed, finally. I have an install PDF I'll post, once I find a suitable hosting place for it. In the mean time, this is how it came out. I put a switched 12 volt accessory outlet in the tray and ran it from the non-switched outlet under the AUX in jack. The package I got came with the FM Traffic receiver and it needs to have access to an open place, hence the location in the tray. I also didn't want wires hanging down the dash. The Nuvi is removable so it's pretty easy to come and go. The switch is in the tray, which is not seen in this picture.