LOR controllers, if they are not really old, will auto-switch to DMX when they see it on their inputs.
That can be the problem, though. If you do switch to DMX, what will be your DMX source? (USB dongle?)
If it is an "industry standard" DMX dongle, the output signal will be on wires #1 and #2 (orange/white and orange)
LOR controllers expect their input to be on wires #4 and #5 (blue/white and blue)
so you need some method to swap the signals to the first LOR controller. It will daisy chain like normal to any follow-on LOR controllers.