Refer to the following steps on how to properly attach the Waterproof Case of the Action Cam;
- Slide the buckle lock in the direction of  and hold it, then hold the circled parts and swing out the buckle in the direction of .
- Open the case cover and insert the camera in the case body.
Release the REC HOLD (lock) switch on the camera.
- Insert the tab of the case body into the slot of the case cover.
- Hook the buckle over the tab on the lower part of the case cover  , then close the buckle in the direction of , until it clicks into place.
Close the buckle until the buckle lock returns to the original position.
For additional reference, click on the Video Tutorial link that contains instructions for the SPK-AS1.