Array Shrink Wrap Curve tell me pls best way to make this holes
on grey path  it's like insert then looptools
On yellow path i want to try shrinkWrap and array mod along that curves 


OR tell me please how to make this faces with the same size then apply insert and looptools
Select the face and snap the cursor to it (Shift+S-->Cursor to Selected). Then delete the face (press X).


Press Shift+Num 7 to align the view to selected face. In Edit Mode add a plane and align it to view (check the Align to View box in Tool Shelf).


Scale the plane to achieve a desired size of the hole and connect the vertices of your helmet mesh to it. Next delete the newly created face.


Now you've got a regular hole.