7 PREMIOSystem Manual Connecting Your Keyboard, Mouse, and Speakers The picture below is an enlarged view of the back I/O connectors. The keyboard, mouse, and speakers connectors are color coded for your reference. Simply connect your keyboard to the purple keyboard connector, and your mouse to the green mouse connector. Next, connect your speakers to the light-green connector; this is assuming you are using the onboard audio. If you have an add-on audio card, please consult the manual for the location of the speakers connector.