HP Pavilion dv5221tx Notebook PC - Manual (Page 143)

Optional security cable
NOTE The security cable is designed to act as a deterrent, but may not prevent the
computer from being mishandled or stolen.
To install a security cable:
1. Loop the security cable around a secured object.
2. Insert the key (1) into the cable lock (2).
3. Insert the cable lock into the security cable slot on the computer (3), and then lock the cable
lock with the key.
NOTE The location of the security cable slot varies by model.
ENWW Optional security cable 133