A:
Do NOT use an adapter to connect your FM Direct Adapter (model FMDA25) to your SiriusXM radio cradle. Every SiriusXM radio vehicle cradle has four receptacles on the back or the two sides of the cradle. These are Power, Antenna, Audio, and FM. The FM direct adapter has a small diameter plug that will fit into the "FM" receptacle on the car cradle.
Note: The FMDA25 is an accessory specifically designed for vehicle applications. The home cradles do not have the FM receptacle and the home cradle is not compatible with the FM Direct adapter and can not be made compatible. If your SiriusXM cradle only has three receptacles then it is a home cradle and is not suitable for installation in a vehicle.