I try to dig through the information that I have.
But just from a quick glance at this photo, it sure is a much different box on the stbd than on the right.
The port side was the housing for the radar and had a rounded forward edge.
The stbd side box was used for...
... but it seems it has a sharp angle on leading edge, and it also looks like it might even get wider at the top? (ie. it is angled outward going up, not vertical).
Of course, without multiple pics it is just a guess.
I seem to recall some large scale (1/25?) conning tower kits that were offered from a German company a while ago (now discontinued). If I recall correctly, there were some that had the stbd side box.
Does anyone know the ones I mean?
A.R.T. ?