Can I open phone and disconnect flex cable without powering down?

I first want to thank everyone in this community. Next, my question: after replacing my iPhone 6 screen, the home button doesn’t work. Not sure if I miss connected a flex cable or it’s something else. But I don’t have the passport to get in and without that home button working, I can’t do a factory reset until the phone shuts down( I can’t shut the phone down manually, need to wait for the battery to drain).

so right now, I want to get into the phone to reconnect the fleet cable when I replaced the screen. Do I need to wait for the battery to drain to do this? Any solutions are greatly appreciated!!!!