-Make sure the ignition is turned off
-Connect the red/black wire to the red switch
-Connect the blue/white wire to the black switch
In case you don't have the switches installed permanently to test the device, make sure to insulate the connectors, otherwise the board can get damaged if they touch one another!!!!
-Connect the white plug we've unplugged earlier to the my500e MUSICA module
-The module can be stored at the bottom of the center console
-Install the top cover, don't forget to plug the window regulator switches back in ;-)