Dell INSPIRON 531S Owner's Manual page 18

1 back panel connectors
2 card slots
3 power supply LED
4 voltage selector switch For selecting voltage rating.
5 power connector
6 padlock rings
7 security cable slot
18
Setting Up and Using Your Computer
Plug USB, audio, and other devices into the
appropriate connector (see "Back Panel Connectors" on
page 19 for more information).
Access connectors for any installed PCI and PCI
Express cards.
Indicates power availability for power supply.
NOTE:
May or may not be available on your computer.
Insert the power cable.
Padlock rings are for attaching a commercially available
theft-deterrent device. The padlock rings allows you to
secure the computer cover to the chassis with a padlock
to prevent unauthorized access to the inside of the
computer. To use the padlock rings, insert a
commercially available padlock through the rings, and
then lock the padlock.
Security cable slot lets you attach a commercially available
antitheft device to the computer. For more information,
see the instructions included with the device.