Hello friends!

I have Audi A8, 2003. I want to try to connect an external audio source to amplifier. My Amp serial number: 27503268 and model number: HS 6315.
This Amp consist two connectors, the one is fiber optic and second is the 23 pin plug. I've attached a picture of my AMP.
I have two questions:

1.Could anyone have this 23 pin plug description and could send me?
2. How can I get the" hidden menu" on MMI system?

Thanks for all.