IBM NetVista 6644 Quick Reference page 17

6. Connect universal serial bus (USB) device cables to the USB connectors.
Note: There are two USB connectors on the front of the computer and
three USB connectors on the rear of the computer.
7. Connect optional device cables, such as speaker, microphone, or
headphone cable to the appropriate connector. (These connectors are
available on some models only.)
8. Connect the Ethernet cable to the Ethernet connector.
USB
Device
Ethernet
Setting up your computer
5