I've got an 03 TL-S w/o nav, and I want to install a HK Drive and Play. Does anybody know if the stock radio/6 disc has a input jack on the back for a direct connect? I've heard both yes and no, and I don't want to spend the cash if I can only do an FM transmitter install. Also, do I chance the install at Best Buy, or should I go through the dealer, or what? Any help would be appreciated.