About this detail of the Tiger
There were variants of the HL230 engine: the P45 for the Tiger E and the P30 which was used in the Panther. Apparently the newer engine was designed to work well in the Panther and later vehicles, while the Tiger E remained unable to benefit from the improvements. One example of this is the air filters on top of the engine.
Cyclone filters to remove dust had been added to the Tiger E in the form of external 'Feifel' filters. Now they were added to the engine itself. Square boxes carried these filters, enclosing both of the cylindrical oil-bath filters, as shown in this photo of a HL 230 P30. The cyclone filters are indicated by arrows.
These new filters did not work with the Tiger E because it had no convenient way to remove the dust. Therefore I believe these cyclone filters were never used in the Tiger E, even when its own Feifel units were discontinued. It retained the HL 230 P45 which had the cylindrical oil-bath filters only.
This photo shows the preserved Tiger E at Saumur museum  . For some reason it has a HL 230 P30 engine installed. However the filters on top are the oil-bath filters of a HL 230 P45. Here, we can see the rear dust outlet on the right-hand side. It is not connected to anything.