Great guide. I replaced the battery last week (speaker went bad a couple of days before battery was replaced). I didn’t remove all the components to replace the battery - used the string/floss/fishing line and pry method to remove old swollen battery. Having done that, I was ready to tackle the speakers. The iFixit video for battery replacement shows pretty much this whole process as well, but much easier to scroll through this guide.
Just finished replacing both speakers using this guide. VERY good. I did not remove the individual wires - just removed the card with wires attached. Seemed to be the safer, easier way to go.