Aux input on my Alpine CD Change?

[gadgetphreak]

I have an Alpine MP3/CD changer that was pre-installed in my ti when I purchased it. Hanging from below the changer is a set of RCA aux input jacks...

Have you seen that before, any idea how you use them?

I couldn't imagine being able to have an Aux input at the CD changer that would allow the oem deck to access it without somehow telling the head unit how to switch to the aux input instead of the change.

Anyway, thought I would check and see if anyone has seen this before and knew what the heck was up.