Samsung SyncMaster 732N User Manual page 19

RGB IN port
Kensington Lock
See Connecting Cables for further information regarding cable connections.
Connect the signal cable to the 15-pin, D-sub port on the back of your
monitor.
The Kensington lock is a device used to physically fix the system to
something when using it in a public place.
The locking device has to be purchased separately.
For using a locking device, contact the place of purchase.