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1. Back panel
Connect USB, audio, video, and other devices.
2. Expansion-card slots
Provide access to ports on any installed PCI Express cards.
3. Power port
Connect a power cable to provide power to your computer.
4. Power-supply diagnostics light
Indicates the power-supply state.
5. Security-cable slot (for Kensington locks)
Connect a security cable to prevent unauthorized movement of your computer.
6. Padlock rings
Attach a standard padlock to prevent unauthorized access to the interior of your computer.
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