The Picatinny rail mount fits in the 1/4"-20 standard mount on the bottom of your Aurora, Black, and Pro camera.
(Not to be used on Aurora Sport.)
Align the guide post on the mount with the guide hole on the bottom of the camera.
Align and tighten the screw on the mount into the screw hole on the camera.
Adjust the mount screw to approximate the spacing of the Picatinny rail. Place the camera and mount on the rail and tighten the mount screw.