What would the Penrose Diagram look like that represented a black hole (call it Black Hole-B), inside of a massive black hole (Black Hole-A), in our universe?
and, as inside of the Penrose diagram for BH-A (PD-1), would be attached to the upper diagonal edge of our universe's Penrose Diagram (PD-0), a) Would the Penrose diagram for BH-B (PD-2), lie along the upper diagonal edge of PD-1, (the Penrose Diagram for BH-A)?
and, since radial "Space-Like" direction lines? in PD-0 become "Time-like" in PD-1, and vice versa, would they then switch back in PD-2 and revert back to the way they were in our own universe?