without opening mine up I'd say it looks correct but obviously if the speaker magnet is in the way of where the light needs to be it's incorrect. I know I've removed the light from mine with no issues or need to remove anything but the marquee. Maybe the bracket that holds the fixture is bent a bit or mounted backwards? Or maybe the speaker has been replaced with one that has a larger magnet than the original? I know for sure there are 6x9 speakers with smaller magnets so that might make the difference.
Perhaps this is some quirk of it being a possible prototype.
The dirt on the wires and bolts is completely uniform. Doesn't look like anything has ever been messed with. In the cabinet, I only found one side of the former bulb with electrodes on it. Is there a short, one-sided bulb in existence? Can't find one online.