Dell Precision 330 - Manual (Page 37)

Advanced Features 37
NOTE: When the setup password is enabled, you must know the setup
password before you can reset the Chassis Intrusion option.
Security Cable Slot and Padlock Ring
These features allow you to attach commercially available antitheft devices.
See "
Security Features (Mini Tower Chassis) " and " Security Features
(Desktop Chassis) ." To prevent unauthorized removal of your computer,
loop the galvanized security cable around an immovable object, insert the
attached locking device into the security cable slot on the back of your
computer, and lock the device with the key provided.
NOTE: Before you purchase an antitheft device, ensure that it works with the
cable slot on your computer.
NOTE: Before you remove the cover from the mini tower chassis, you must
first slide the outer padlock ring to the left to unlock the cover release
mechanism. See "
Cover Release Mechanism (Mini Tower Chassis) ."