How do I turn on the PSU after FirmwareUpdater postflash?

Hey guys! I have the PSU Control plugin configured that I use gcode commands to toggle the PSU. So far I've managed to make the FirmwareUpdater plugin turn off the PSU after it flashes the firmware (since I have an SKR V1.3, it needs to powercycle each time I flash the firmware); however I can't figure out how to make it turn back on since the printer is completely disconnected from Octoprint. DOes anyone know how to do this?