The camera mount and camera screw to the mount.  The mount then snaps in place on the rail system from the Matrice 600 (pro).

The included wire connects to the camera and is fed through the underbody of Matrice 600 and then connects to the A3 Light Bridge as noted in the photo below.

The camera connects to the A3 Light Bridge behind battery 6 and you need to feed the cable to this plug.  You may need to be creative on how you get your fingers or a long set of forceps or needle nose pliers to plug it in.