Thanks. Just in case anyone is wondering why I did it the way I did...its because my car is leased so I didn't want to do anything that couldn't be easily undone at the end of the lease. If you own your car you could do a better job by cutting the plug off and splicing the feed to the socket.
There are also a couple of alternative socket types available from Radio Shack to provide different kinds of outlets. Here they are:
http://www.radioshack.com/product/in...entPage=family I used older version of this I've had for a few years.
http://www.radioshack.com/product/in...entPage=family You could cut the plug off and insert the wires into the plug it like I did, or splice it in.
http://www.radioshack.com/product/in...entPage=family