Relink audio to video clip pasted in timeline in FCP7?

Hi, I need to add the original synced audio back into a montage I made in FCP7. I originally made the montage by pasting video clips into the timeline without their corresponding audio - instead of simply pasting video and audio for each clip and muting the audio like I used to (somehow I thought this new way would be easier). Each clip in the montage was cut using in and out points on their respective source clips, but in some cases I've used those source clips for other sequences so the in and out points I'd used for the montage aren't all still saved. What is the easiest way to reinsert each clip's audio without manually cutting each in and out point again?

Sorry if this is a beginner's question! I hope I explained it well.

Thanks,

Adam