Okay, so my new headunit should be here sometime today, and my wiring harness and dash kit should be at the audio shop in the next few days... So Ill have Alpine + iPod in my car very soon

... my question is, where should I run the wire for the iPod to? The cable comes out of the back of the headunit, so im thinking either glovebox or into the ashtray. For anyone with an aftermarket headunit and iPod, where did you run your wire to? and if anyone knows of pics or a how-to for the location, that would be great! Thanks in advance!