I found it easier to reverse steps 22 and 23. You got more wiggle room to get the spudger underneath the left speaker connector. Just be careful when you remove the left speaker since the left speaker wire is still attached to it’s connected and the adhesive that you got to work loose on the belly of the speaker.
I removed the battery …. helps getting the logic board out.
Well on my mid 2012 MacBook Pro the screw heads are definitely not T6 but rather J000. Will place the removed screws on a paper drawing of logic board. Good tip ….