Dell OptiPlex DCCY Setup And Quick Reference Manual page 21

2 Connect a USB device, such as a keyboard or mouse.
NOTICE:
Ensure that you connect the network cable to the connector identified
with the icon shown in the following illustration.
3 Connect the network cable.
NOTICE:
Ensure that you connect the modem to the connector identified with the
icon shown in the following illustration.
4 Connect the modem (optional).
Setting Up Your Computer
21