Ah sorry, I thought you were referring to me (Michael). 🙂
There are several ways to go about this. Either sync audio to each camera before making a group clip, only sync one of the cameras before grouping, or just group the entire camera set and the audio in one step.
Each have their advantages and disadvantages:
1. Syncing audio to each camera angle will give you individual sync clip but takes the longest as you are repeating steps.But should you ever need to edit any of the material single cam, it is synced for each angle. You can also slip sync on the resulting .sync clip of needed before grouping.
2. Syncing one camera to audio then grouping to all camera angles is probably the fastest method as manual sync would occur to only one clip, then grouping would use the common video timecode (if available). If not, then you could use a visual to group. When editing the sequence, lay down the good audio as the reference. You can also slip sync on the resulting .sync clip of needed before grouping.
3. find a common mark in all camera angles and audio then group directly. This removes one sync step but will not allow you to slip sync should it be needed.
My preferred method would be #2. I just mark an IN at each of the common frames/sync then use AutoSync. The resulting clip will be the shortest of the two. So sync to the longest before grouping. I never sync via the timeline method myself, I just do the marks to the sources, sync, then load subclip into source monitor with source monitor timeline to slip as needed. I also make my projects a 35mm/4 perf project so I can slip audio sync down to the quarter frame. This eliminates the sequence/subclip step as well as renaming the source clip steps.
Michael