Looking for adapter cable EA 6785/00 for DCC822 or the pin diagram of it

To use the aux input of the DCC822 an adapter cable type EA 6785/00 is needed to connect the connector C to the headphone connector of a portable CD player. I could make my own if I have the pin diagram of the 13-pin connector C for the CD-changer or aux input. Can anybody help me with this?
I promise to make a video of the manufacturing of a replacement adapter.