Epson 2000 - Manual (Page 67)

Note
Before you install the hard disk drive, turn it over so you can
see the circuit board, as shown below. Locate the side of the
drive connector containing pin 1, indicated by a “1” or “2”
printed on the board. You will need to know the location of
pin 1 when you connect the hard drive cable.
pin 1
Installing the Hard Disk Drive Below the Diskette Drive
Follow these steps to install the hard disk drive in the bracket
below the diskette drive:
1. With the drive components facing down, slide the drive into
the bracket until the front of the drive is nearly flush with
the edge of the bracket.
4-6 Installing and Removing Drives