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Yeah, it was definitly a different PSU. But I made it work (cable ties, bit of rewiring in the middle and leaving the bottom plate off).
I just really wanted the fan in there as it was crucial to me to get is as silent as possible.
I just used a longer m3 screw and didn't screw it all the way in. Yes, the position was correct

Now I only need a new parts fan duct for the Noctua 40x20 ;) (https://www.amazon.de/gp/product/B07125KWG1)

P.S. Danke & Grüße aus Berlin ;)