Dell OptiPlex 9020 (Mid 2013) - Manual (Page 5)

Ultra Small Form Factor — Front and Back View
Figure 5. Front and Back View Of Ultra Small Form Factor
1. optical drive
2. optical-drive eject button
3. power button, power light
4. drive activity light
5. headphone connector
6. microphone connector
7. USB 3.0 connectors (2)
8. network activity light
9. captive thumbscrew
10. padlock ring
11. security-cable slot
12. power connector
13. line-out connector
14. line-in/microphone connector
15. VGA connector
16. DisplayPort connectors (2)
17. serial connector
18. USB 3.0 connectors (2)
19. USB 2.0 connectors (2)
20. network connector
21. network link-integrity light
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