wow she sure is complete, has lots of the right bits.... the gunners seat i am not sure if that is original or repro... i think the Mk2* had a fixed seat which was in a raised position mounted to the centre bulkhead....as pictured below
the back box on the rear armour i think mounts so the lid faces out and the clasps along the top...again i could be wrong.
please forgive this image it is a model but its the best i could find on my laptop