Samsung SD-R5472C-TMAF - Manual (Page 12)

and Connecting Cables
Installing DVD±R/RW Drive
Connecting the Power Cable
Hold the power cable (with four pins) in the power box within the computer with the cutoff edges( )
facing up and connect it to the power port in the back of the DVD±R/RW Drive
A - Cutoff edges
1 +5V DC
2 Ground
3 Ground
4 +12V DC
Improperly connected power cable may cause malfunction. Check the direction of the
power cable and the cutoff edges before connecting the cable.