It seems like each brain is unique and it is meaningful to speak only about "connections" between regions and areas, given that even structure of nerves are different from person to person.

And, of course, it isn't even near to what we could call a "working model". Just a mapping of every neuron of some particular brain specimen. No one understands how it works yet. There are detailed description in textbooks of how each kind of cells in the brain works, but still can't see the mind among neurons.))