Dell OptiPlex SX Guide De Configuration Et De Référence Rapide page 20

Grasp the top piece of the cable cover and align the two tabs with the two slots
4
in the computer's back panel.
Insert the tabs into the slots and slide the piece toward the diagnostic lights
5
(see the illustration).
Install a security device in the security cable slot (optional).
6
18
Setup and Quick Re ference Guide
security cable
slot
Do not place the
computer face-
down on the bezel