I have an 06 RX-8 with Sirius radio already installed. However, I never use it and prefer to use my ipod. I saw the gta car kit for our cars and the installation seems simple with just plugging a connection at the back of the stereo. Does the Sirius radio use the same plug as the gta car kit? If so, can I just unplug that and plug the gta kit instead?

Mazda RX8 2004-2008 - AUX, iPhone, iPod and MP3 adapter

Thanks for the help!