Do you know, that… ?

The formation called fill pattern You can use built-in shapes to be cut, including circle. At the same time users have a choice of four types of formation. If you use pie, the program automatically places the source in the middle of the occurrence of the indicated wall.

And what if, when you expect a different arrangement?

Well, you can point other than the default point, or vertex position as a source. In my case, I intercede Virtual intersection point after selecting two edges.

Then I point this point as the position of the source array.