How to fit the trigger correctly on probuilder object?

Image: Collider.jpg - Google Drive
Hello,

I have created this half circle with probuilder and I want it to be a trigger.
But when I set it to trigger, also the inside of the object becomes a trigger, not only the object itself.
What can I do to archive this, that only the visible part will be a trigger and not also the inside?

If you want folks to see the image, you probably should just use the image attach function of the forum.

As for the question, you can make different colliders. Make a smaller mesh for the portion you want to be a trigger.

I started adding small box collides, but this is not very user friendly to set up 20+ box colliders.

The Image link is not working with google drive, so I posted the link.