Lenovo ThinkServer User Manual page 36

Integrated cable lock
An integrated cable lock, sometimes referred to as the Kensington lock, can be used to secure your server to
a non-permanent fixture. The cable lock attaches to the integrated cable lock slot at the rear of your server
and is operated with a key. The cable lock also locks the server cover. This is the same type of lock used
with many notebook computers. You can order an integrated cable lock directly from Lenovo by searching
for Kensington at:
http://www.lenovo.com/support
Figure 9. Integrated cable lock
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ThinkServer User Guide