Epson 386SX - Manual (Page 28)

3. One end of the printer cable has a 25-pin, D-shell, male
connector. Connect this end to the parallel port on the
back panel of the computer, as shown below. If the plug has
retaining screws, tighten them by hand or with a
screwdriver, depending on the screw type.
retaining
screws
1-8 Setting Up Your System