Magellan RoadMate 860T Reference Manual page 20

Chapter 3: Vehicle Installation
Plug the data cable (TMC connector) from the TrafficKit Module into the enhanced cradle
Connect the antenna cable to the TrafficKit Module.
Connect the power in cable from the TrafficKit Module to the cigarette lighter adapter cable.
Press the windshield mount to the glass and slide the locking lever toward the glass.
11