Double Dark Side! Diesel & 8P
Do you mean the piece of hose i've marked in red by the FPR? Is there 2 pipes coming from the FPR on a fork?
On the S3 mani there are 3 nipples underneath roughly marked in the positions of the blue bits. 2 3/4mm nipples and an 8mm (I think) one in the middle behind the dipstick, which you block off.
The rear nipple should go straight to the top of the DV as shown by green line. and the front nipple to the FPR.
You can then block off the pipe i've put a red bit on as this connects to the 8mm nipple behinf the dipstick.
I'm guessing that your mani and engine is quite different now.