"WMATAGMOAGH"
According to The Story of Metro, the 2000s were relegated to the Red Line shortly after their arrival. Other than that period, I don't think they were ever exclusively assigned to a single place.
At that time Brentwood was the primary maintenance facility. Alexandria yard was in the process of being put on line. As I recall, once Alexandria yard got up and running the Breda cars were found on all lines. Expectance testing was done on the J Route between C and J Junction and the west yard lead junction of Alexandria yard. During most of the procurement of the of the Breda cars Alexandria yard was their home base much the same way the 5 and 6k cars have been based out of Greenbelt during their procurement and expectance testing.
John in the sand box of Maryland's eastern shore.