Before you glue in the roof → ask Google about images.
Start by comparing the box-art with the roof in the kit.
The kit roof is flat but the box-art (based on a period photo) shows the turret sitting on a ring.
The roof part also stands above the sides which it should not. The height of the armored visor is probably correct but if it is suspended from the half hinges molded on the roof there will be a gap at the bottom. The rear curved parts of the cabin sides extend upwards to cover the turret ring. The rear curved parts are also separate plates so there needs to be a plate joint between the two vertical rows of rivets at the front edge of the curved part.
I had to pry off the roof from mine to do some retroactive plastic surgery …