unity slider or input field initial value from gameobject variable

is it possible to set the initial value of a slider or input field from a gameobject without scripting?
I want a option in inspector like events. But in a reversed way.
I want to drag and drop a gameobject into a field and select the public variable from a dropdown menu. Like the UnityEvent UI.

in other words:
I have a public float and want to select a gameobject property.

I think you have to script