I don't know either with the notion this kit wasn't around in the
ANH era. I can't confirm for certain either way. The only thing I can think of was the B/W photos were taken quite a while after
ANH, but before 'Empire'. The Karl part could have been added during this period & not being an 'original part. This would explain a few of the other missing parts that show up in these 'early' B/W photo's, such as one possibly from the 312b on the starboard side mandible wall.
IMO, the Falcon got pretty beat up in storage between
ANH & Empire so new parts were added & somewhere during this period the B/W were taken.
Stu