Epson Epson - Manual (Page 128)

4. Position the connector on the cable so the red wire aligns
with pin 1 on the drive. Make sure the holes in the cable
connector fit over all the pins; then push in the connector.
5. Locate one of the power supply cables that lead from the
power supply. (They have multi-colored wires and a plastic
connector on the end.) Align the notched comers of the
power supply connector and the drive’s power connector;
then push in the connector, as shown above.
Installing and Removing Tower Drives 6-7