Gently pull the circuit board up and out of the front case and set aside.

There's nothing holding either the pads to your board or the buttons into your front case, so take a moment to make sure you didn't drop any.

Remove any buttons you need from the front case. The Z button is the only one of note; there is a metal lever that sits in a groove and a post on the back side of it that sits in a hole to align the trigger.