An interesting concept…
The boom is as far back as possible and extends aft to allow a receiver to break away up, down, left or right and where the aerodynamics are least effected.
Put a boom in a bay and now, unless it extends a really long way, the receiver will have to be right under the tanker and with an interesting airflow around the bay, bay doors, boom, tanker airflow and receiver.
Im reminded of the XB-70/F-104 collision…..