Yep, I've studied this photo before but mostly because of the ball and socket mount for the 0.30 gun seen in the upper right corner. There is a difference between the mounts used in the very early B-25NA, A and B compared to early C and D models. Your photo shows a later type (K-2) as per the scheme you posted earlier, post # 429. Compare with earlier mounts, here on a B-25B "Tokyo Raider"; the earliest types have black covers on the outside:
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The later ones are protruding:
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As for you question: I know from Russian publications and sites about the fact that the Soviets didn't have a bombardier but a "shturman" who was both, navigator and bombardier. I'm not sure if they could move all the equipment from the navigator's to the bombardier's station and I believe both compartments have been used but in a different way. On the photo in question the dial in a lighter frame is for sure not part of the original equipment. The 2 boxes with dials over the bombardiers hand are also not as per original equipment - see below.
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I might have some more detailed description of those changes somewhere in the archive, but couldn't find it just "at a glance".
Cheers!