Not sure how to identify it on the box, but the missing footage is in ESB. One of the sides is supposed to start with Leia welding on the Falcon. It is missing this bit which I think is around 10 seconds. Watch for it and if necessary check it with the GOUT to make sure.
Scroll down to the comments section:
http://www.lddb.com/laserdisc/05091/0693-84/Star-Wars-Trilogy:-Definitive-Collection