Assign selected actor shortcut?

I just saw this. under the Keyboard Shortcut settings , the subsection GraphEditor. There’s a shortcut

'for assign selected actor ’ which it says Assign the selected actor to be this node’s referenced object

I’m assuming it helps me connect 2 nodes reference by just using shortcut… sounds incredibly useful. but i tried selecting , pointing at nodes and couldn’t get anything to work. I’ve of course already set the shortcut already.