Hi has anyone got a schematic for the B&O in the boot of the A4?

I wanting to know the pinouts of the amp modual, so I can hook up an external Sub the the pre outs, as I don't fancy taking it from the standard sub speaker, as thats an output of a class D amplifier, so not the best place to connect to

Also would like to know where the "Switched" power is for the ICE, so to connect to my amp's remote power on/option.

A circuit dirgram of the power amp modual would be excellent if one such exists out there somewhere?