Epson Endeavor 468C - Manual (Page 116)

5. Locate one of the power supply cables that lead from the
power supply (behind the horizontal drive bays). The
power supply cables may be secured in a plastic band on
the side of the power supply. If so, unfasten the band to
access the cables; you can use any one that is free. (If your
drive requires a small power supply cable connector, use
the small connector.)
6. Position the power supply cable connector so that its notched
corners line up with the notched corners of the power
supply connector on the hard disk drive. Make sure the
holes fit over all the pins and then push in the connector
firmly.
Caution
If you do not align the cable connector correctly, you could
severely damage your hard disk drive when you push it in.
Installing and Removing Drives 5-13