I am trying to install my Sirius Satellite Radio Starmate 4 right now. For the options to get the audio, there is an option to hook up to you AUX in your faceplate, which I have one. So I would like to do it this way. However, the kit did not come with the cord that runs from the AUX in my Faceplate to the AUX in the Starmate. Where do I find this cord, and what is it called? Help!!!