GREEN: This was a 'solid' fairing, and did not open.
RED: Spotlight opposite side. The opening here was for the standard strike camera, not of use on the raid.
BLUE: No extra cables etc. The drive belt was on the Starboard side.
ORANGE: This area was more flat, with a slight curve, not as rounded as your projection.
MAGENTA: Second spotlight in the orange fairing.
CYAN. This was the standard lower fuselage. The ventral guns, when fitted, where in this section.
I'd need to check which aircraft on the raid had the ventral turret. The aircraft was a last minute replacement, I think for McCarthy. I might be able to find you photographs of the detail areas mentioned, and a AVRO drawing of the 'Upkeep' installation, but it'll take a few days, as I'm behind with a lot of stuff at the moment.