Epson Epson - Manual (Page 108)

2. Identify the IDE device connector on the IDE device cable
that you will use.
3. Locate pin 1 on the drive connector. If you do not see it on
the connector casing and you did not locate it before you
replaced the drive bracket, you may have to remove the
drive and turn it over to check the circuit board.
4. Position the connector on the cable so that the red wire
aligns with pin 1 on the drive.
5-20 Installing and Removing Slimline Drives