How to model this part of Carabiner?

Hey guys : )
I tried to model the upper part but I get pinching, can you give some tips how to make it properly?
I have a lower part.
But i’m stuck with the upper :confused:
Thanks many times.

hello, maybe share your file: https://pasteall.org/blend/


Here is it . )

I would start with an extruded plane…select the top Face and Spin 360+_ and the Knife tool to clean up…

I already have the shape but need to clean up the topology on corner i have 5 sides poles that make pinching but i dont know how to fix it :confused:

you can try with this topology, it works not too bad:

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