If you have one of the Peripheral (or PAC) PXAMG (or uPAC) interfaces and want to add the Sirius SCC1 tuner/antenna kit, this is the cable you need.

With this cable, you'll be able to connect your interface directly to the Sirius SCC1 tuner. This will allow you to enjoy Sirius satellite radio in your car and control it through the factory radio (must be satellite ready), provided you already have the Peripheral (or PAC) interface, of course. That means no ugly dash-mounted tuners with this set-up!