Need help with the Charging System for a '91 Pathy. Fresh battery, New alternator, however the the system is NOT charging. With the vehicle off the the battery voltage measures 12v. After starting the vehicle the battery voltage still measures 12v.(at the battery terminals). Checked wire continuity from the battery to the alternator and it checks out good. There is a 2 wire connector on the alternator, I don't know what that connector is for or what it does. Any advice on this would be great.

Thanks in advance.