I added some things to a friends 05-07 and they were behind the glove box. They were very short ends, like 6" long.
Open the glove box,(empty it now, before you regret it) squeeze in the sides to the rubber stoppers let the whole thing tilt down (why it's important to empty), and they were near the top, kinda had to look for it. If I remember correctly, they were rated for two different amperages, two were something like 30 and two were 20 or 15 or something. I believe that info is in the owners manual.