Re-link new audio into multicam sequence

I hope my title makes sense, I'm not too sure how best to describe it. 

Here's what happened:

- I created a multicam sequence based on some tracks

- I started editing it

- Then I realized that there was a problem with the audio. I went back to the multitrack sequence and had to add new audio tracks for the audio that I actually wanted.

- Problem: the new audio is nowhere to be found in my multitrack sequence.

I can create a new multicam sequence, which would include the correct audio, but then I'd have to re-do all of the editing I already did... Is there any way in the existing multicam sequence to tell it to select other audio channels? 

Thanks for any help