Hello. I am selling my beloved prefacelift S3 as I now have a B5 S4 avant. I am planning to take the phatbox out of the S3 and install it into the S4 and take the oem cd changer out of the S4 and fit it into the S3. HOWEVER! Not sure how the oem cd changer fits into the S3 as the phatbox came with it i.e. is there a black metal bracket/cage type part to fit it onto the sub? A picture of a standard fit oem changer and its fitting would be helpful if possible? Cheers, Ross.