CD Changer problem
So I bought a cd changer from a member. Installed it, loaded it up and it loads and scans through each tray. But its not selectable in Idrive. Says, "No selectable or supported audio media in either internal drive." Each cd I have tested in the cd drive previously with no problems. I have tried it with and without cd's in the dash cd and dvd drives. I have the option list sheet for my car, though it was purchased used. It and a vin check both say it is pre-wired for a cd changer and sirius radio. So after trying every way I could think of to make this work, I dismounted it and unplugged. This is when I noticed the plug itself. It only has two wires from the car connected to it (see photo). The plug looks like it has forms for something similar to RCA connectors but with no wiring. My question is, is this correct? or is it missing something?
Thank you for any help!