WARNING: This page is about a different car, the 1987 Chevrolet Corsica and 1987 Chevrolet Beretta. However, it is still accessible from the selected car via links, so may be relevant.
Fig 1: ECM Terminal Id (24 Pin A-B) (Early Production)
Fig 2: ECM Terminal Id (32 Pin C-D) (Early Production)
Fig 3: ECM Terminal Id (32 Pin E-F) (Early Production)