7.This is the hardest part. Soldering.

Make sure you layer it with tape to prevent the copper to move around.
The panic button remains in the same place. No need for soldering.
8.Solder the metal battery holder from the old FOB
9.Put the plastic switch on top of the copper and tape it on the side. Don’t tape the black stuff. Again, precision is important if you want the button to work and have a solid button. It takes me about 5 times to adjust it until I have the solid button feeling.
10.Put a small double sided tape on the casing so it will hold the board in place while you put them together.
11.Put the battery in. Make sure you put the (-) and (+) side correctly