Forgive my ignorance, but which one is the D terminal? Is it the smaller of the two wires that are attched to the studs on back of the alternator?

__________________
1998 E320 Wagon

1992 300D 2.5 TURBO

1991 560SEL M119.960

1986 300SDL TURBO

1992 500SL Parts Car

1991 420SEL Parts Car