Apple Power Macintosh 8600 - Manual (Page 9)

9 Setting Up Your Computer
3 If you want to adjust the angle of the keyboard, lower its feet.
Connecting a keyboard with a separate cable
1 Plug the mouse cable into the port on either side of the keyboard.
Most right-handed people prefer to use the mouse with their right hand; most
left-handed people prefer to use their left hand. Plug the mouse into the port
on the side you prefer.
The plug and the port are marked with the V icon (symbol). Align the
symbols before you insert the plug. (The positions of the port and icon on
your keyboard may be different from those pictured here.)
ADB icon
To adjust the angle of the keyboard, lower the feet until they snap into position.