Amazon has as always solved everything top. The spare box came faster than I could return the defective box.
But, oh horror, in this connection, another element was not poured properly, so that it already when
Installation abknickte.
Actually, you could scrap the need to return again - but I needed the box urgent and so I
with its own "board means" connect tinkered.
This cushion box is not worth the money, because the manufacturer apparently in pressure saves plastic!