Replacement Audi AEG Phone for Nokia Car Kit for H

From my 96 A8 I want to remove the built-in AEG phone, no cell phone.
I want to insert a recording of Nokia's Car Kit 91 in the folding bracket between the armrests.
Into the trunk in place of the AEG SE part, the "hardware" of the Car Kit.
Can someone tell me the occupancy of the cable harness, which goes into the SE part, I just need:

- Microfon (where does this actually sit, because not on A-pillar)
- Speaker, suspect under switch shut down interior monitoring DWA, driver B-pillar)
- Long-term increase
- Ignition plus
- Mass
- Phone mute

If someone could help me, that would be great!!!

Thank you very much!!!