Help Wanted Custom SubGraph default parameter

I have created a subgraph that, among other ones, takes a Vector2 as a parameter meant for UV input. But quite often that parameter is left assigned to a UV0 node that I create. Is there a way to make the subgraph's parameter by default to be assigned to a UV0 the way this is done with SameplTexture2D or TilingAndOffset nodes?

 

This is what I have now:

And this is what I would like to have:

 

Found out it is called Port Binding but still did not get how to apply it.