Finally, we're in!

Now you've removed the metal plate, you'll be presented with the membrane we need to repair.

The ribbon cable from earlier is a part of it, and it needs to be fished through it's tiny slot before you can remove the membrane. There may be a little glue holding the membrane down, in which case pull up slowly at a shallow angle to release it.

Underneath the membrane it is a sheet with tactile domes serving to press the pads on the membrane together. This sheet can stay here as it's of no concern to us.