I'm totally lost and you are my last hope. I spent my day trying to stick these two faces with the magnet. I followed all the tutorials I found about to snap an object to the face of another object. I missed something but what?. Here the two faces.
Thanks.[![enter image description here](https://i.stack.imgur.com/yxA7V.jpg)](https://i.stack.imgur.com/yxA7V.jpg)

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I forgot the other face I want to snap, sorry [![enter image description here](https://i.stack.imgur.com/yxA7V.jpg)](https://i.stack.imgur.com/yxA7V.jpg)