Final Cut Pro X :: Move Clip Connections From Bottom Timeline Rather Than Top One

I'm doing a quick promo. I recorded a rough script VO, organised my clips and music. 

I then had the professional voiceover artist record a revised script. 

However, I can't simply replace my original script as we have added a couple of things. What I would have done under 7 is lock the background music and video clips in place, remove the VO timeline, and then replace each bit separately. However, I can't do that because the video clips have connected themselves to each other. 

I also have shuffled a couple of things around so need to keep the video the same, but move the audio to a different part. I can move the video without moving the audio, but I can't move the audio without moving or deleting the video.