I recall reading somewhere (years ago) that the track for "Jamaica Farewell" wound up being used for "Sunshine."
It was actually the track for "Little Girl" - however, not the version cut in July, but rather a Bruce-produced remake cut on 24-track at Rumbo the following November.
The existing documentation indicates a July 23rd session for "Little Girl" and "Jamaica Farewell", and a July 24th session for "School Days" (and, apparently, "Stranded In The Jungle"). Musicians listed on the AFM contracts for both days are Dennis Budimir and Tim May (guitars), Don Randi and Mike Meros (keyboards), Ray Pohlman (bass), and Hal Blaine (drums). Kind of a scaled-back production Brian-wise (no horns or additional percussionists).