How to Mount a Windshield or Car Vent in a Pioneer S1 Navigator
- 1). Place the AVIC-S1 unit into the mounting cradle. The cradle has three arms that will snap around the main unit, locking it into place.
- 2). Connect the mounting cradle to the adapter end of the suction mount.
- 3). Press the suction end of the suction mount onto your windshield.
- 4). Pull down the lever on the base of the suction mount to lock it into place.
Source...