Success:
I had chattering sound on Prevoius near perfect Mac speakers. I order this right speaker and the tool kit (star wrenches). Removed the panel it took some force because there’s some middle fasteners that pop out And then the panel slides as noted in this and various tutorials from the rear latches.
The speaker is glued in with a gasket like perimeter strip around the speaker. I should’ve taken a video on this since I couldn’t find one but I heat gunned the front of the computer just a little bit so it’s fairly warm to the touch and then used a knife to poke the in place broken speaker and pry it out at one end. Took a bit of force but it actually didn’t damage the removed speaker with only a slight indentation in it’s housing. I used the adhesive gasket like strip to adhere the new speaker therein.
Now I just want to know root cause what blowout blew out the speakers.