I picture the Star Destroyer shot being after the Death Star explosion, but before it cuts back to Han and Leia on Endor. That might be challenging to fit it within the musical cue of that sequence.
You would have to play with the sound effects and music, but I think if you slightly trimmed the explosion shot, and maybe cut out the first Ewok reaction shot (and let the first reaction shot be the shot of R2), you could make enough space within the confines of the score where you could fit in the shot of the Imperial armada retreat.
I know this is the Sequel Redux thread, but might as well have this conversation here.