Well, it turned out not to be an issue, mainly because I had forgotten about the windshield wipers. I mounted the inside box right above the rear view mirror but as I was cleaning the glass for the outside base, I noticed that it was right where the wiper would swipe. Oops! So anyway, I put it in the top right corner of the windshield and it works like a champ other than it making a lot of wind noise. Thanks for the suggestions.