Seems like you have already done a lot by now. It's time to get rewarded. Put back the opened pieces after a successful repair of the ControlTalk. Do not rush. You must align the tabs appropriately and as exact as it was otherwise the ControlTalk will keep falling apart or will stay half open to one end all the time. It's because it lost one of the tab or alignment got broken during your adjustments.
Remember, there's no screw or any metal binding here. Only the plastic alignments that keep the tabs stay fit and secure even though they are fragile. Lack of thoughtfulness or little carelessness is enough to see them falling down in no time. They may break off on any small stressful push or pull. So handle carefully.