Gotta love The Allseeing Eye, Monster Edition, tying up loose ends.
It looks like Hector really was working for Hautwyrm, and really was an idiot, and I doubt it would have made the Mechanicsburg papers if Hautwyrm had attacked some other city, so she came with the Iram Solis to take on the most fortified city in Europa. Hector may have been an idiot, but arrogance leads to stupidity that idiots can only dream of.