If the key is held inside the security bezel, remove it out of the security bezel.
Press the latch to release the key.
Remove the key from the retaining clip in the shown direction.
Figure 1. Key removal
Carefully insert the tabs on the security bezel into the slots on the right rack latch. Then, press and hold the release latch 1 and rotate the security bezel inward until the other side clicks into place.
Figure 2. Security bezel installation
Use the key to lock the security bezel to the closed position.