
Hi Julian,
this is a cutout from the PrinzEugen-site and I think the part 27d is named "Wintsch" or winch. But I'm not able to identify the name of the other part; maybe my glasses....
Hope, I could help you...
Cheers
Michael 
 
 Sorry, I have to correct me!
I infered  the word "Wintsch" from the last letters in the drawing, but the german word for winch is written without a "t" = Winsch; so my former description is wrong!
So I took my magnifier and could identify the words -but this isn't realy an answer!
Part 27D is named "deutsch" or "german" and for part 82D it's "franz." the abbreviation for "französisch" or "french".
So I havn't realy an idea, what that means; what is so important for the use of  S-boats to differ between a german or a french part / access / adapter on the deck / the ceiling of the galley of an S-boat. Maybe it's a cover of an connection to bunker something? Water or electricity with different connectors?
I hope anyone else has a clue!?
Hopefull waiting for a solution
Michael
PS: parts 85D are "Lüfter" or vents