I did understand the place the fight takes. I just simply assumed that ToB story takes action on the same map right after the end of SoA... so that those ever pathetic fools - citizens didnt have enough time to rebuild the destroyed buildings.
SPOILER!!
And doesn't Irenicus say the same words to the Cowled Wizards escaping his cell in the Spellhold at the beginning of ch3?
I have to go find that ToB and install it before starting playing the solo then. New abilities are alway welcome