Back Chassis View - Dell OptiPlex 5055 Small Form Factor Owner's Manual

Back chassis view

1 Line-out port
3 Serial port
5 USB 3.0 ports
7 Expansion card slots
9 Power supply diagnostic light
11 Network port
13 DisplayPort
15 Cable cover lock slot
2 DisplayPort
4 PS/2 keyboard port
6 USB 2.0 ports (supports Smart Power On)
8 Power connector port
10 Kensington security cable slot
12 PS/2 mouse port
14 Release latch
Chassis 9