The content of this article applies to both Insteon On/Off Keypad (8-Button) and Insteon On/Off Keypad (8-Button).
Unfold all of the wires from the junction box. Separate the black wires and cap them with wire nuts.
If your switch's wires do not match the diagram, consult the additional wiring diagrams available below.
Follow the on-screen instructions in the Insteon app to add On/Off Keypad.