To post screenshots go to
www.photobucket.com. There you will find instructions on how to create a free accound and how to upload pictures. Once you have them there you can then copy and paste them here.
As far as the holes go, in real life the limber holes, as they were called, allowed trapped air to escape when the boat was diving. You should be able to see through some of them, though most would give a view of the pressure hull and external piping. I've never seen through them in the game, though SH5 does allow that. I'm not sure what you're seeing, but I'll be curious to see it once you get those pictures up.