Lenovo 10041-10049 - Manual (Page 15)

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User Guide
1.3.9 Connect any additional devices that you have. Your
computer might not have all connectors that are shown.
USB connector Use this connector to attach a device that requires a USB
connection.
TV-Tuner
connector Only supported on systems with optional TV tuner card.
Ethernet Use this connector to attach the computer to an Ethernet-
type local area network.
1.3.10 Connect the WiFi antenna to WiFi card connector. (This
connector only equipped on the model with WiFi card.)
WiFi antenna connector — To connect the computer to a wireless network.
Screw the WiFi antenna on the WiFi card connector if the model you
purchased is equipped with the WiFi card.