410 Alternator charging fault

[Chippy]

Hi, I'm new to the club, and was hoping some one could help me with a problem.

My 410 is not charging the battery, I've already fitted a voltage regulator, and have now bought a new alternator, I've tested the wiring, but I'm now starting to think I may have the wrong alternator, the Alternator has 3 connections, the main battery lead and two field wire connections. The old alternator only has one.

After scouring the internet, the only wiring diagram i can find is for a dodge, which has the same engine, in that diagram one field wire connection on the back of the alternator goes to the field wire connection on the voltage regulator, the other connection on the back off the alt' goes to the ignition side of the regulator, which is very easy to do, just add an extra wire, my concern is, in the dodge wiring diagram, it does not show a battery warning light.

I have spoken with the supplier of the alternator and they are not being helpful. A 410 alternator wiring diagram would be very helpful, or any advise if some one has had the same issue