Samsung SyncMaster 753s Owner's Manual page 11

Rear
(The configuration at the back of the monitor may vary from product to product.)
1. Power port
2. Signal Cable
Note: See Connecting Your Monitor
Connect the power cord for your monitor to the power port on the back of
the monitor.
Connect the signal cable to the video port on your computer, video board,
video card, or graphics card.
for further information regarding cable connections.