Insert holes using 2D elevation drawing

Create or import 2D elevation drawing and position in the correct projection.
Optional: Group 2D elevation entities to move and rotate as one item.
Select Front view.
Select Rectangle tool and Insert Opening modifier.
Click two points snapping on 2D elevation drawing.
Observe the hole is projected to the nearest face based on the front view.
Note, the 2D elevation does not have to be on the face of the wall. Just be sure the position in the Front view is correct