#1 do not even start the car with it full fielding like that, dont even consider it. call whomever is helping her & ask them to swap the same "location" brush from the dual field terminal later OE alt that has the broke "batt" stud over to the single field terminal early alt they mistakenly sold her, to convert the single field terminal alt to a dual field terminal alt. both alts have 2 "ends" on the single field circuit but the early one, the terminal has no male lug for the blue wire plus it is grounded to the case. you are subbing in an ungrounded (insulated) brush/brush holder from the later alt to the early alt so you can plug in both blue/green field terminal wires. No comment if the hard components are still functioning but your odds are good. (DONT start eng). use the fiber washers etc from the old one so the added brush/brush holder ain't grounded to the case square metal nub that it bolts to. duplicate the no continuity to ground condition of the orig one