I agree. I think this view is Segnas from the Glarus side of the ridge, the Tschingelhörner would be to the right of this picture. This would be consistent with the claim the photo of the aircraft with ‚smoke trail‘ was taken in Chamm, Glarus and that is categorically not an image of the accident. The accident occurred on the other side of the ridge on the Graubünden side.
I think, the lowest part of the ridgeline in the very right part of the Pic must be the Segnas Pass, so the crashsite is just behind.
skadi