Epson EQUITY 386SX/16 PLUS - Manual (Page 147)

The connector at one end of the cable has two rows of
holes, one of which is blocked with a plug, as shown
below.
The ribbon cable socket on the back of the drive has two
rows of pins. In one of the rows, a pin is missing.
ribbon cable connector
I
n
‘blocked hole
ribbon cable socket
‘missing pin
Installing and Removing Disk Drives
B - 1 3