I successfully opened the mic side of my Evolve 65 and re-soldered the wire which connects the non-mic side speaker to the circuit board. I used the tool in the picture below to push in the tab which connects to the pin. See the tab in Picture #2 from Fred Fierling @fff666. I can confirm that this tab is on the "the front one if you keep the mic on your right" as Christian Kjaer @fizzyelf said. I think it would be pretty hard to break this tab by pushing it in because it has reinforcement on the backside. If you pull the earpiece as you push in the tab, it will slip off when you pushed the tab far enough. Good Luck!