About this detail of the Tiger
This is the loader's periscope cover, part 40. It is correct for a Tiger with a low cupola, such as Revell's kit 03116. But it is the wrong shape for a Tiger with a high cupola.
In any case, Tigers did not carry a loader's periscope until April 1943. By then, the tank had an escape hatch and other features not provided in this kit.
You should not use this part.
[1] Survey of Tiger 250122, at Bovington museum, by David Byrden