I've got my Escort 9500i in the same place, just to the right of the rear view mirror. It performs great, and I get warnings from miles away most of the time. I chose to go into the headliner and hardwire into the sunroof. Which plug it is depends on which car you have, but it will be one of the two on the passenger side of the panel. Trial and error is how I figured it out. Just make sure you read up on how to reset your sunroof, in the event you pooch it like I did. There's ample forums on how to do this.