I found it! I was just confused about the dimensions of the picture. I bent the pin, and it works fine!
Thank you very much, without your help I would have bought a new wiiu! Now I have so many options. :)
On Reddit, unluigi said this:
I could not contact him. Does someone else have an idea how to fix this problem? I already searched through the complete web.
I tried different SD cards, tape as the slider and much more. I think it is a hardware problem from my wiiu. How to fix this problem with the WiiU SD Card write protect sensor?
I have a similar problem as this: