Dell Dimension 5150__E510 - Manual (Page 6)

1 voltage selection switch See the safety instructions in the Product Information Guide for more information.
2 power connector
Insert the power cable.
3 back panel connectors Plug USB, audio, and other devices into the appropriate connector.
4 card slots Access connectors for any installed PCI and PCI Express cards.
1 link integrity
light
Green — A good connection exists between a 10-Mbps network
and the computer.
Orange — A good connection exists between a 100-Mbps network
and the computer.
Off — The computer is not detecting a physical connection to the
network.
2 network adapter
connector
To attach your computer to a network or broadband device, connect one
end of a network cable to either a network jack or your network or
broadband device. Connect the other end of the network cable to the
network adapter connector on the back panel of your computer. A click
indicates that the network cable has been securely attached.
NOTE: Do not plug a telephone cable into the network connector.
On computers with a network connector card, use the connector on the
card.