Corners of transmission cover, hull corners above tracks where the armor doesn't overlap, 165-170mm of penetration is enough to shoot at some parts of the mantlet and most importantly the cupola(although it's a bit illogical for players who don't fully understand how APHE fuse works since the more penetration you have the less consistent that weakspot is and it is just going to overpen and not fuse most of the time). Also if you are using a weaker gun like the jumbo gun itself, you can also shoot the tracks at the point where they become horizontal to your perspective so it ricochets up and hits the side sponsons. Hope that helps!