Multicam Audio- mono to stereo FCP 10.4.10

I just looked at my Q: title, I may have misspoken. I am looking to make the clip a dual mono so each R:L Channels play the interview a long winded fix, seems to be detaching the audio from the clip, copying each detached clip, Pan Mode: Basic Surround and for the amount moving the slider to -100 for a mirrored sound to the left channel. There used to be an easier way of doing this...besides making the original track a dual mono before syncing. argh...and of course I made the edits and would rather not start over. does this make sense?

The speaker's audio only goes to one channel.

Yes, it is a multicam clip. Originally one camera angle with a separate audio track (Camera 2). only the right channel of the audio meter is dancing as it plays.

thank you. that clears that up very quickly. THANK YOU!