The Queen is the mind that is formed when all the drones are connected together, just in the same way that you are the mind formed when all of your brain cells are connected together.
And which of my brain cells is the "Queen Cell?
None of them. The Queen isn't a drone, just the same way your mind isn't a separate cell. The Queen is a disembodied consciousness that occasionally controls a physical body like a puppet. The mind of the queen is not confined to that body, it is spread throughout the Collective, just the same way that your mind is not confined to a single cell, but spread throughout your entire brain.