MEP-004a, T3, Exciter
The PIN:072239-001, manual, back page. paper
Army TM 9-6115-464-34, 18 Jan 1994, same manual, front page. paper
a pictorial diagram:
page 3-271....Fig 3-130 Static Exciter...item #45. It rests just behind the big wire wound resistors.
then on page 3-273, Fig 3-130 sheet 3...