I don't know, what decompiler do you use. If it's FFDec, then it has a script section on the bottom of content list, where are all things that have scripts: Buttons, DefineSprites and Frames. I would prefer scripts listed with all other object tags, but FFDec author made it this way. There is barely anything else than few scripts in that launcher file, so I shouldn't be hard to find. I can take a screenshot if necessary.