Epson EL 486UC - Manual (Page 92)

2. Identify pin 1 on the drive and align the connector so that
the red wire is at pin 1, as shown below.
red wire
3.
4.
Locate the multi-colored power supply cable with the small
connector. This cable is attached to the system board rather
than the power supply.
Position the power supply cable connector so that the holes
fit over all the pins. The red wire on the cable will align
with pin 1 identified at the power connector on the circuit
board of the drive.
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 4-19