Epson 486SX - Manual (Page 28)

Connecting the Keyboard
Follow these steps to connect the keyboard:
1. Make sure the computer is turned off.
2. Hold the keyboard cable connector so the arrow indicator on
the housing faces up. Insert the connector into the port
marked with the keyboard icon, as shown below.
Caution
Although the connectors and ports for the keyboard and
mouse are physically identical, they cannot be used
interchangeably. Be sure to plug the keyboard only into
the keyboard port.
1-10
Setting Up Your System