Remove the four screws securing the center cabinet panel on the side of the hot tub and open the door to the control box.
Feed the armored cable from your electrical junction box through the opening provided on
the bottom of the control box.
Connect the red, yellow, black, and green wires from the Sentry Control Panel to their respective counterparts in your electrical junction box. Make sure that they are secured tightly.
Close the Control Box and reinstall the side panels with your screwdriver to complete the installation.