Not sure if you did anything the tweeter removal but here are some more pics that might be helpful:
Looking at the base section McLaren 570S - Speaker Cover - P/N 13N1204CP it seems that the tweeter is secured from below. To get to it you may need to pry open P/N 13N1204CP The pictures I posted are from Dash Panel Dashboard Black Leather LHD Mclaren 570S 540C 2016-18 maybe try to call them and ask them to send you some more pics.Thanks RBH, those pics do help. I haven't made any progress lately -- those two little silver screws seem to be the problem. I can't get to them from inside the tweeter housing, and can't get underneath the dash. Do you know if those two silver screw-type things secure the tweeter housing?
That's really what I need to know, b/c tugging on the housing, seems like something may break. I know I am trying to release the tweeter housing from that small plastic insert, the small piece with the two silver screw-type bolts sticking out.
lol, you know that tweeter was probably worth at least 30hp...Dealer removed the hideous ‘microphone ‘ tweeter while in for service. Can’t tell any difference in stereo system. Now just waiting for carbon fiber bits I ordered to find a cover for the small exposed part. You may commence a thrashing!