DavidL: If I remember correctly ( which I sometimes don't) the old style Airtronics connecter had the retaining tab on the metal terminal. The blue "Z" connecter has the retaining lug on the blue plastic plug. Not sure, but I don't think the old-style metal terminal will fit the new blue "Z" plug.

But it will fit the JR plug, just like you said! Might want to tag that as being wired for a "Z"-type connection.