Do not cut the adapter off. Sirius uses 6V, not 12, so the adapter is needed to step down the voltage.
Go to radio shack or an auto parts store and get a cigarette lighter port that you would normally install into the dash, plug the adapter into it, and wire that to the power feed to the radio.
That way, the sirius will turn off with the car and you can stuff all the wiring behind the dash. If you wire it to the cig lighter instead, it will stay on all the time.
_________________
2008 Unlimited Rubicon - 3.5" AEV/Nth lift - 35" MT/R with Kevlar - AEV Wheels - York OBA
2008 Patriot - Fuel Saver
