ComQuest Sound Card
There are usually only two audio inputs you will need to be concerned with on the Sound Card; the Line input (usually Blue), and the Speaker output (usually Green). The Red or Pink connector is for a Microphone, which you will usually not use for ComQuest purposes.
Be sure your speakers (or an external amp, if you are using one), is always plugged into the Green Speaker jack. Your source device for recording prompts and song hooks, usually a cassette deck or CD player, should be plugged into the Blue, or Line in jack.