I have just checked the Panzer Tracts volume which covers this, and your kit looks about right. Its hard to tell as the photo I have is taken from a higher angle and the gun breech is in the way. But the gap on the left is defiantly correct. I am guessing that box would slide out to open it. And from what I can tell, the right side looks ok as well. The kit does seem to be missing some minor detail such as hinges on those box's along the top on the one on the right, but other than that, it looks ok.
Would you like me to scan the image and send it.
I am a Norfolk man and i glory in being so
On the bench: Airfix 1/72nd Harrier GR.3/Fujimi 1/72nd Ju 87D-3