The early drafts will give you perhaps something indictive or in some cases precisely what was planned to go at certain points.

It all depends on how the script was revised. But from here you can start to build a picture to the music.

Also check out any production stills for anything that points to a filmed but missing scene.

It can be very frustrating, but it’s great when you get some of the answers you are looking for and for that reward you get to understand the music and also what footage the music is meant to go with.

But your brain can also end up in knots over this stuff too 😃

You can not rule out music editing also in this game also, it may well be that there is no missing footage but just the music is alternate. There could be footage re-arranged in a different order also and simply no missing scenes.

But the most common answer is actually all of the above!