Epson EQUITY 386SX/16 PLUS - Manual (Page 187)

Connect the diskette drive ribbon cable first. As shown
below, there is a tab on one side of the connector.
diskette drive connector
tab
diskette drive socket
notch
Align the connector with the socket so that the tab on
the connector lines up with the notch in the socket.
Make sure the holes in the connector fit over all the pins
in the socket and then push in the connector.
Caution
If you do not correctly align the holes with the ping
you could severely damage your computer when you
push in the connector.
9. Now locate the hard disk drive ribbon cable. Pull the
cable over toward the socket and fold it so the tab and
notch are aligned. Then connect it in the same manner as
the diskette drive cable.
Installing and Removing Disk Drives
B - 5 3