Maybe we call him the "Pilot" to avoid misunderstandings by the names.
I say: It was a form of Contact in Fiasco
A very crude one, but it was.
In any else novell of Lem, two lifeforms, beared by their own evolution, get together.
Ok, we contacted with robots, but thats not the same, because we know their evolution.
There is one we do not understand.
Nowhere else Lem had let that happen.
So I think, that the "Pilot" had the change to analyze the Quintanian just with one look is a form of contact.
We can say that the Quintanian had naked white bodies.
So we know there aren't black huge stones.