Can you drag&drop from Mediabay to Machine inside Cubase?

I have Cubase 10 Pro. Inside my project I have Machine opened as a VST. When I click on a sample in Mediabay to drag it into Machine directly it shows on the Machine’s channel the green “+” sign, telling me it is possible to drop it inside, but when I release the mouse button, it does nothing. Nothing was added into Machine.

Is there a workaround I don’t understand?
Also, is there not a “show file location” in the Mediabay, so I could at least search for it like that?

I’m on a Mac.

Thank you.