Premise: Imagine a "sender" construct that has the ability to create it's own micro black hole and send information as light into it. On the receiving end, a "receiver" construct would contain it's own white hole paired to that black hole to receive the information (essentially transferring at a apparent faster-than-light rate).
Situation: For simplicity, imagine one sender and two receivers in the shape of a 3 light year equilateral triangle. I want to send information to one of the two receivers.
Problem: If I want the sender to open a black hole and the specific receiver to open a white hole, the sender needs to contact the receiver and go through some type of "handshake" that tells the receiver to open that white hole because information is coming. However, for that handshake to work, information needs to be transferred and because there's no black hole connection established yet the information would need to be send via 3rd dimension like starlight and thus would take three years to even reach the receiver, which defeats the purpose of apparent faster-than-light data transfer in the first place.
Question: How can this connection problem be solved assuming (our best) current understanding of physics?
Restriction: Looking for an answer that does not include the sender maintaining a black hole open to every single receiver indefinitely.