On my last car I just ran it into the fusebox, inelegant but it worked, where did everyone else hook there's up on the '05?

 

Ran all my power down the passengers' side: 4-guage power wire from battery, amp turn-on leads from head unit, ground from head unit. Used distribution box in trunk to split power to two amps, also used distribution box for ground: both amps, head unit, chassis of one of the amps (recommended by mfr.). No interference, hum or whine whatsoever.

 

If you've got an A/M head unit, it should have a remote lead - us it. If not, I just did the fuse box. It works, no one ever sees it, it's behind a cover.