Dell Precision 620 - Manual (Page 5)

With both hands, press against the bottom edge of the cover to make sure that the securing hooks at the bottom of the cover click into place.
6. Slide the two halves of the padlock ring together to lock the cover release mechanism.
7. If you are using a padlock to secure your system, reinstall the padlock.
Interior Service Label
Figure 4 shows the location of the interior service label on the inside of the system cover.
Figure 4. Interior Service Label
Internal View
Figure 5 shows the chassis with the cover removed to help you orient yourself when you work inside the computer.
Figure 5. Orientation View
Front Panel
NOTE: The computer should be placed fully on a flat surface. It is difficult to align the cover if the front of the computer is
hanging over the edge of a table.
1 Externally accessible drive bays
2 Hard-disk drive cage
3 Chassis intrustion switch
4 Power supply
5 Security cable slot
6 Padlock ring (with padlock)
7 AC power receptacle
8 Expansion-card slots
9 I/O panel connectors