Samsung DP300A2A-A01US - Manual (Page 77)

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Chapter 3.
Using the computer
Using the Security Slot
You can secure the computer by connecting a lock and cable to
the Security Slot.
To use this feature, you have to purchase the lock and cable
additionally. To use the lock and cable, refer to the product
manual.
Tie the lock and cable to a fixed object and install the other end of
the cable to the security slot.