Dewoitine wings and ailerons

I’ve looked long and hard at photos of the Dewoitine HD41/410 Schneider racer but cannot make out the details of the wings, all the shots I have are front 3/4. So my first question is; does anyone have photos that show the rear or top of the wings? Then in the absence of photos I have looked at other contemporaneous machines for a clue to how thay may have been constructed and note that the 500/510 series of monoplane fighters were fitted with near-full span, narrow chord ailerons. Does anyone know what advantage they believed these gave?

Cheers