Epson 386/25 - Manual (Page 29)

Once you have the correct printer cable, follow these steps:
1. Place the printer next to the computer with the back panels
of both components facing you.
2. One end of the printer cable has a 25pin, D-shell
connector. Position the plug to match the orientation of
the parallel interface (marked with a special icon). Then
insert the connector into the port, as shown below. If the
plug has retaining screws, tighten them by hand or with a
screwdriver, depending on the screw type.
Setting Up Your System 1-9