This kit can be improved by a number of simple fixes for its mistakes.
This is part D27. Tigers did not have this little box; Ustar were apparently confused by a modern box added to a museum Tiger. You should omit this part, and remove the stub that it glues onto.
There are three smoke launchers (part H32) on each side of the turret. They have notches in their rims.
The instructions don't say so, but the notches should always be aligned like this. This is the only way the real system could be assembled.