The 20mm Hispano gun is pointing downward, actualy all the forward firing guns are, in the picture you can see part of one of the 7.5mm MG's pointing down as well. They are doing this so that they can beused for strafing ground targets, the Br 691/693/695 series were ground atack planes, even the sight had two posations I beelave. The later series I beleave did away with this feature, the two posation gun feature.