I know there are countless threads, but no where is it posted clearly. I want to install a line out converter. What color wires need to be tapped on the x9331. Does anyone have a simple write up. 2007 cooper s w/ mini boost radio. thanks in advance.

 

a few months late, but I was able to find the diagram to the x9331 in this forum. I believe it's the black pair and the yellow pair of wires that you need to tap into.
I just did this on my car earlier this week. Here's the only pic I took.