Trimming multiple surfaces with a brep

Alright so I got the trimming of a circle to work out with one circle.

I only wanted the polyline/surface that is inside the brep.

This works!

Now How would I go about this if I have multiple circles that should each be trimmed and should each return their surface inside the brep?

Do I need to use a graft here or a special list / tree?

Included is a screenshot and the file.

Thanks for your help.

Lukas