Epson 2000 - Manual (Page 71)

2. Locate the hard disk drive connector on the system board.
3. Position the system board connector end of the cable so that
the red wire aligns with pin 1 of the connector on the
system board. There is a “1” printed on the system board to
identify pin 1.
hard disk
drive
connector
4. Make sure the holes in the connector fit over the pins; then
push in the cable connector.
could severely damage your system board when you push
4-10 Installing and Removing Drives