First, if you mean having 2 mics parallell by daisy-chaining, yes, it’s technically possible, but prepare for unforeseen consequences. If you just remove the original mic and have a new on the breakout, than all lights are green, it’s safe to do!
And everything is accessible via eagle schematics. If more people are eager to change the mic but not technical enough to do it, I would happily make a tutorial.
I’ll soon check the schematics and return with a detailed answer.