The missing footage card is in the wrong place but you are right there is a missing scene there.
Actually I thought there was no music for it… Basically the missing footage is at the iris transition.
It was meant to be an establishing shot of the Falcon in Space flying towards the planet Bespin.
There may also have been a slight extension to the first shot of the falcon flying past the camera, this is speculation but the camera would have dropped through the clouds before the falcon flys past.
It is possible that there is meant to be a small break at the Harp gliss prior to the iris transition to accomodate missing / extended scenes and take in to account Falcons Roaring engines.
Check your cue for the timpani hits. They are to do with the doors and then Lando appearing at the door. The special edition shots were in fact planned shots that never made it in the film so the music is restored to a point in the Special edition. Use the special edition footage here to correct the timing of the music at the end for the cues for Landing platform doors.
With that said the cue seems to be correct for the tension string right at the end when Lando threatens Han. So perhaps I am wrong there and the Special Edition shots were something that was never planned… unless there is a meant to be a music edit that is. Perhaps it is just coincidence the timpani hits line up with the two shots of the door when you add the extra music to the special edition?