Lenovo ThinkStation P520 30BE User Manual page 18

7 Microphone connector
Use this connector to attach a microphone to your computer when you want to record sound or if you use
speech-recognition software.
8 Audio line-out connector
The audio line-out connector is used to send audio signals from the computer to external devices, such as
headphones.
9 Audio line-in connector
The audio line-in connector is used to receive audio signals from an external audio device, such as a stereo
system. When you attach an external audio device, a cable connection is established between the audio line-
out connector of the device and the audio line-in connector of the computer.
10 Power-cord connector
Connect the power cord to your computer for power supply.
11 Security-lock slot
Attach a Kensington-style cable lock to the security-lock slot to secure your computer. For more information,
see "Attaching a Kensington-style cable lock" on page 30.
12 Key-nest slots
Install the key holder that comes with the computer-cover-lock key to the key-nest slots.
13 PCI/PCIe card area
To further improve the computer performance, you can install PCI/PCIe cards into this area. Depending on
your computer model, the pre-installed cards in this area might vary.
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P520 User Guide