There is an extant piece of tracked music earlier in the episode that is still on prints of The Cage that is actually from "The Man Trap" ("Dead Center", when Crater's body is found dead in sickbay...
"Dead Crater"....the cue sheet had a typo.
Yes Christopher, I've gone back to the GNP, it's missing a good chunk of "Monster Illusion". We've got it all assembled properly as heard in the pilot. It's great!