Connect the RC+ and RC- wires together, ie short them, driver goes into standby. Disconnect them, ie open them, driver turns on.
The other stuff regarding various voltages is just another way of doing the same thing.
Yeah, much easier as to use an external relay like with all other HLG drivers. One can also use dimmer knobs with build-in on/off switch. Its a nice feature and I realy miss it on all the other HLG-series drivers.
Yepp, only make sure the RC wires are not connected. I would use a heatshrink tubing or some iso tape and then hide them. But you can also connect them to a simple on/off switch.