Thank you, gentlemen; I have much more clarity. I was fairly sure it was the outboard cannon that was removed, but Googled one model--without supporting photograph--(and foolishly unsaved, so I can't find it again) of a desert Hurricane with only the outboard cannon, and those tipped in red. I also appreciate the insight on patching over the cannon port. The possibility of an additional 7.7mm was suggested by this 1/48 Hasegawa kit cover, which shows the outer port patched over with red tape--usually associated with Spitfire and Hurricane 7.7mm wing guns, but with a hole through the patch, as if the hypothetical machine gun had been fired: https://www.scalemates.com/kits/hasegawa-09544-hurricane-mkiic-north-africa--931559.
I'll assume the 20mm shell ejection port was a simple patch over as well.