How to trim hole in wall for my door

I have sketched that patio door and I have made it with many groups. But now I want to include it in walls of other models but I can’t trim it cause it is nested group. How can I modify it to work the way I want to ?
Porte patio2.skp (476.2 KB)

Basics of SketchUp at learn.sketchup.com

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