Here is the correct information for how to reset SMC.
It depends on T2 Security Chip/ T1 Security Chip on your Mac.
(You can check a security chip model by pressing “option key and apple logo icon on the left upper corner on the screen and click “System information” and click “controller”.)
Thank you. I am suddenly wondering what kind of glue is good for use to be replaced with a new speaker part, as you noted that you used a double-sided tape.
As for the 2017 model speakers, I am leaving a piece of information for someone who wants to repair speakers.
Where can I buy the right-side speaker component, 2017 model? As you noted in the 3rd step section, you find the structural differences between 2016 and 2017models. When I search the 2017 model right-side speaker in ifixit. com here, the component seems to be only 2016 model as below:
