How to Connect Robot to Orchestrator

I was making new Orchestrator service.
Yet, I didn’t connect the robot on orchestrator. But in my mistake, I uploaded the workflow and run the job.
It runned!
Is it possible?

And it’s strange.
In Uipath assistant, the robot is connected. But in Orchestrator is looked disconnected.

I didn’t connect robot to orchestrator.
Is there anything I missed?

Create Machine–>Create Robot–>Get Machine key–>Connecting at Assistant; Success on Assistant but not on Orchestrator…