So i've searched through the forum to no avail. I'm trying to figure out if I can use the CD Changer Capable function on my stock "Premium" head unit on my 1993 GLX Passat as an aux in. Its supposed to be able to control Panasonic changers, and I even have the pin outs, I just don't know how to make sense of them. There isn't an "cd changer" setting on the head unit at the moment, so I am assuming that a cd changer has to be connected for it to be an option, so im wondering it its something as simple as grounding some pins or adding resistance to certain pins, or if there's something out there that will allow me to just use it as an "aux" in (minijack or rca).

The bottom most connector would be used to connect to the cd changer: