Retrofit air duct in the rear

Incidentally, I have come across the fact that you can retrofit the air ducts in the rear. To do this, you only need a few parts and you have to dismantle the amature board. Now the question, has someone already done this? Because I don’t really want to believe that the nozzles are simply moved in the footroom to the rear, as it looks on the picture?! The distribution nozzles would theoretically have to come out of where the locking for the seats is in, is so easy and the Carpet is open at the spot. MfG <-BS->