Simply fix the back plate to the dash of the vehicle and fix front plate to the cradle with screws provided. There is a large screw (shown above) that holds the plates together through a ball joint so that the plates can be tilted and swivelled into the position required. This screw can be accessed through a hole in the back of the cradle.
The hot-swap option means that you can unplug the charge cable from the cradle and unscrew the single screw and release the cradle from the vehicle. This is useful for maintenance.