The Rebel, much like other Outback monitors, has the ability control the monitor's apply button using an external switch.
To take advantage of this feature, you will need to find the 050-0041-01 or the Com 2 cable that comes with the Rebel (Note if using ISO the Com 2 cables part number will be 050-0042-01). One of the ends will be labeled Run-Hold. This will be the end of the cable that controls the Rebels apply button.
IMPORTANT NOTE - DO NOT HOOK THIS CABLE TO ANYTHING THAT WILL SUPPLY DIRECT VOLTAGE. THIS WILL CAUSE DAMAGE TO THE REBEL