From #2, , point the main gun toward the sun and sun is inside turrent (not through aiming recticle)
From #1 drivers seat, raise head position and you can see sun through the main gun barrel.
In both cases you'll point tank and gun barrel so they line up in the general direction of the sun and move the head position.
I didn't try the Tiger.
I'm still getting a pulsing flash along the side of the panzer gun barrel and external parts of the tank I can see only this time I was well away from any airfield.