When replacing the fingerprint/home button:

1. place the home button in the new front panel, slip it under the plastic insulation at the “top” of the button

2. heat the iOpener gel pack, lay it gel side up on your workspace, place the bottom (home button) end of the front panel FACE DOWN on top of the iOpener, let it heat the adhesive on the home for 2minutes

3. Use the “pencil” spudger tool to gently seat the home button from the backside of the new front panel - you’ll see a uniform “recess” to the outer ring when it’s seated properly

On a iPad mini 3 you MUST remove the home button cable connector, before you have access to the battery connector