Lenovo H520s Hardware Maintenance Manual page 29

Rear view
The following illustration shows the location of connectors and components on the rear of the computer.
1. USB connectors
2. WiFi antenna (selected models only)
3. HDMI connector (selected models only)
4. On-board VGA connector
5. Ethernet connector
6. Audio connectors
7. PCI Express X 16 graphics adapter connector (some
models are equipped with a graphics card)
8. PCI Express X 1 adapter connector (some models are
equipped with USB 3.0 or TV tuner card)
9. Power connector
10. Voltage selection switch (selected models only)
.
Chapter 7 Locating connectors, controls and components
23