Dell OptiPlex 755 - Manual (Page 29)

Quick Reference Guide
29
Back View
8 headphone
connector Use the headphone connector to attach headphones and
most kinds of speakers.
9 microphone
connector Use the microphone connector to attach a microphone.
10 3.5-inch drive
bay Can contain an optional floppy drive, second hard drive, or
optional media card reader.
11 5.25-inch drive
bay Can contain an optical drive. Insert a CD or DVD
(if supported) into this drive.
1 card slots (3) Access connectors for any installed PCI or PCI Express
cards, PS/2 connector, eSATA connector, etc.
NOTE:
The back view of the system will be different if a riser is
installed.
2 back panel
connectors Plug serial, USB, and other devices into the appropriate
connectors (see "Back Panel Connectors" on page 30).
3 power connector Insert the power cable.
5 1 2 3 4 6