Satellite Radio Help Needed

Hello fellow buick owners. I have an XM satellite radio in my car currently being powered by the cigarette adapter plug which cheapens the look of the car with the ash tray having to be open all the time and wires hanging down from the dash. Anyone know how to hardwire it directly to a power source so that i dont have to have a mess of wires spilling from my ash tray?

Thanx,

Pete