It seems, that there is a little bit a messy drawing with old and new planned status overlapped
but somehow, together with the other available drawings it is somehow possible to follow
I tried to make the arrows showing the same on top view and cross section with the same colour
View attachment 299612
View attachment 299613
green and red and black lines - I think there are two maybe three different status of design shown
View attachment 299614
so the four small squares in a row are pillars for the upper deck
and the four small circles are each time two pumps which were moved during the reconstruction, so depending on your time of your model the pumps are the blue or the purple location.
But it is hard to work or see everything on the low resolution downloads
I recommend that you order the original in scale 1:48 from the museum - with them you should be really able to see all the details and also able to read the texts given on the drawings
Also you can really take correct measures out of the drawings