I just bought one of those SunPass Minis. I've got a really stupid question. Does the sticker go on the inside or outside of the windshield?? Just looking at it, I'm thinking outside, cause it looks like it reads the barcode, but then again, I don't know. I've read through the book three times and it doesn't say!!! Or are there electronics inside the thing that it can read through the windshield??