HP Compaq Pro 4300 Small Form Factor Reference Manual page 55

6. Remove the thumbscrew from the access panel (1) and install it in the placeholder hole on the
back edge of the access panel (2) to prevent the thumbscrew from getting lost.
Figure B-8 Removing the Thumbscrew
7. Screw the lock to the chassis in the thumbscrew hole using the screw provided.
Figure B-9 Attaching the Lock to the Chassis
Installing a Security Lock 49