"i did the fixture but the flat to send it to machine is too hard for me"
I did not understand that part, like what do you mean by flat?. As for the rest of the pictures, do you want that the small hole passes through the fixture's hole so that both of them connect.
It would be helpful if you post the stl or step files and the hole you have made with the end product images. And also mention once again which part you want to draw!!