How to connect GROM-USB, GROM-AUX or GROM-IPOD into AUDI with Symphony I, II and some Concert radios

Some Audi Symphony and Concert radios are NOT prewired for a CD changer.
In such vehicles, a solid 20-pin connector block access to the 8-pin CD changer port.
Here are the basic instructions how to connect the GROM adapter or any other aftermarket device with the 8 pin connector (blue) to the back of the AUDI stereo.
In order to connect GROM adapter into AUDI where a solid 20-pin connector block access to the 8-pin CD changer port you will need:
1. Get the stereo harness connected at the back of the radio
2. Cut the 8 pin part on the left side of the harness as shown below
3. Place GROM harness into the open space at the back of the car as stated in Installation Document provided with the adapter

This operation will not affect any function performed by the radio as in most cases the left part of the harness is not connected.

If you do not want to break any of the original harness, you will need GROM AUDIO AUDS harness.