Secure Shelf to Wall and Verify Functionality

What happens here

With the wall mounting screws securely in place and properly spaced, carefully lift the floating shelf. Align the keyhole hangers on the back of the shelf with the heads of the screws on the wall. Gently slide the shelf downwards so that the screw heads engage fully into the narrow slots of the keyhole hangers. Ensure the shelf sits flush and stable against the wall. Once mounted, test the hidden compartment by pulling it out and pushing it back in several times to confirm smooth operation and that the magnetic closure holds it securely.

Goal: Mount the shelf securely and confirm the hidden compartment operates correctly.