Audi concert (single din ISO) non Bose but rear amplified Speakers to Audi concert Quadlock

aqibi2000

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As it should say on the tin, looking for the appropriate harness.

Audi Concert (Single Din ISO) non Bose but rear amplified Speakers to Audi Chorus (Double Din, Quadlock).
 
@aqibi2000 What was your solution? I may buy a second hand Dension Bluetooth module that comes with the quadlock connector. I have Concert II (single DIN, ISO non Bose with amp in the back) and was thinking of using a iso to quadlock adapter to hook up the Dension adapter (I know, too many adapters).
 
I purchased a rsne installation harness the modified it to work (the modification was adding a second b+ feed wire pin 14 and 13)

Below I have added the pin to pin napping I made using the ISO pin out and the headunit pin out
 
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