Opened phone wrong, extra layer, can't access phone battery

I was trying to open my phone to replace the battery, but when I opened it, the cable connecting the home screen to the phone was so short I couldn’t reach anything in. reluctantly, I was able to peel the home screen button from the screen on the inside, but when I got a good look inside, it doesn’t look anything like the diagram shows.

I think there was an extra layer that was supposed to lift with the screen but instead, I separated them, and now I don’t know what to do. I can’t lift the layer that is on top of the battery, and I don’t want to break something.

Edit: I tried putting the screen back on and turning it on and now the screen is totally jacked up.