I had tried pliers and had the same problem - there's not enough wire to maneuver the individuals. What adds to the difficulty is the connector is right against a slot. I had thought of trying to keep them in formation with masking tape, but even if it works, on the one side there won't be any chance of removing the tape - maybe that'll have to be it. I'm still experimenting with the idea. In the meantime I just put it back in operation without the sound.
I read a number of reviews on this case and no one mentioned this problem. Maybe they had a different motherboard or no one wanted to use the audio.
I think you're telling me what I had in mind doesn't exist. If that is the case, then I'll close this with yours as the answer. Thanks for your ideas.