1. Loosen the mounting plate thumb screw, press and hold the safety lock while sliding out the quick release plate. You will be sliding the plate out to the opposite direction of which the arrow mark on it shows.
The direction of the arrow marks the direction the plate will need to go in order to slide back into the gimbal.
2. Install the camera to the quick release plate following the direction of the arrow mark, then tighten the 1/4" screw at the bottom.
3. Slide in the quick release plate installed with the camera following the direction of the arrow mark on camera mounting plate, then tighten the thumb screw to finish the installation of the quick release plate.
4. Loosen the screws on lens support and adjust the support to keep the lens firm and stabilized.