For what it's worth Ronster, I'm personally 100% satisfied that none of the OT cockpit shots should show any glimpse of the Falcon's 'mandible' whatsoever, and are all correct as they are.
This is due to the camera POV mainly pointing *directly ahead* (whether from behind the seats in some shots, or closer to the windows in others) throughout the trilogy. And since the camera views are looking directly ahead in these shots, then we wouldn't see the closest 'mandible' to the cockpit...because unlike your initial mock-up, it is *angled away* from the cockpit.
So I totally agree with FanFiltration's points, who helpfully shows in his 3rd photo that the camera POV would need to be moved over to the right-hand of the cockpit before we would see any of the 'mandible'.
(Thankfully, no extra work required by adywan on any of these OT shots, as far as I'm concerned) :)
The big question however...is whether J.J. will stick to the established *directly ahead* camera POV in his Falcon shots in his sequel, or whether he'll choose to show us something closer to that 3rd photo in Fanfiltration's post?...
Me, I think it would be neat to see a glimpse of the Falcon out of the cockpit at this point, using a differently positioned camera angle inside.