Thanks stikpusher that appears to be it.
They left the machine gun mounts which is what I will do.
They could strap into them for observation in search and rescue.
This is a very fine kit PBY-999. Unfortunatley the main canopy back corner was poorly molded in my kit. Almost like thin cellophane so I will have to repair or get a new one which is a kick in the head for an expensive kit.
This is the second Revell Germany kit with a badly injection molded part. The other being their 1/32 spitfire which they sent a replacement fuselage half (it was not reparable). But it takes over a month.