Epson 3865X Plus - Manual (Page 30)

2. You can raise the keyboard by adjusting the legs on the
bottom. To change the angle of the keyboard, turn it over
and flip each leg upward until it locks into place, as shown
below.
Connecting the Mouse
Your computer has an auxiliary port for an IBM PS/2
compatible mouse that uses a miniature DIN (6-pin) connector.
To connect a mouse to the built-in mouse port, hold the mouse
plug so it is oriented properly with the computer socket. Insert
the plug into the appropriate socket, marked with a mouse icon,
as shown in the following illustration.
Setting Up Your System 1-13