The 62189-01A is for Softail fitment.
The -03 fitting has a flange behind the o-ring, as does the 62189-01A Softail fitting. The difference may just be the length of the fuel line attached; don’t know for sure, but I’ll bet that’s it. The M&M and early Delphi A engine fittings are not flanged.
I may need to check the batteries on my crystal ball, but it currently says that the correct part number for the 2002 FI A engine is 61408-00A. It further says that this fitting was used on both the inlet and return side in 2001 on the A engines, and on the inlet side in 2000.
The 2000 FI machines ran 61407-00A for the return line for just one year. It looks like in 2001 the fuel lines inside the tank were changed. I’ll bet the only difference between the 407 and 408 fittings is the length of the fuel line inside the tank…where you get your gas; good place to avoid.

There may be some hanky panky going on with the parts books. I could take my crystal ball out into the parking lot and try jumping it with the Oldsmobile to see if anything changes. At this point it looks like 61408-00A is the correct part for your application.