The kit's background
This tank VK3001 was a prototype design. Before even a single example could be finished, the requirements changed and the design was altered to become the VK4501, a heavier tank. The Hobby Boss kit is therefore speculative, representing how the VK3001 might have looked if it had been completed.
A product of the Panzer Commission headed by Dr. Porsche, the VK3001 featured electrical transmission (as used in locomotives). Its armament was intended to be the famous 88mm KwK36 which was in fact designed at this time for this tank.
One hull was finished and was driven on test grounds. No turret was ever completed, and we have only a single sketch to show how its armour was visualised. Any model of the VK3001 turret must be speculative, based on the armour sketch and the later VK4501 turret.
Hobby Boss have shown a CAD image that seems to use the VK4501 turret unchanged. This is unlikely to be completely correct, because the VK3001 would have had thinner armour. The designers may have used less robust vision ports and pistol ports than the VK4501 needed. In particular, they may have used a cupola with sliding blocks, similar to the cupolas that they designed for other Krupp-built tanks.
Another problem with the CAD image is the 3-part turret roof. The raised area in the middle of the roof was present on the first few VK4501 tanks, and in an alternate world it would surely have been present on the first few VK3001, but in reality it was soon replaced by a more practical 1-part roof. Therefore this image doesn't represent a credible "production" VK3001.