Herme,
Probably not very good ones! The alternator has only three wires. The big wire from the BATT lug should be spliced into the large wire where the voltage regulator was situated. That large wire was attached to BATT on the voltage regulator and should terminate at your ammeter.
The DA plug has the remaining two wires...the wire plugged into the tab above #2 (on the right, looking from the back of the alternator) should go to the large BATT lug. The other small wire above tab #1 has to see 12 volts whenever you turn the key on. If you have a meter, you can check this pretty easily.
My guess is that #1 isn't being powered when the key is ON.
There should have been three wires at the site of the old voltage regulator. A BATT wire, a ARM (gen) wire and a FIELD (F) wire. The ARM and FIELD get wrapped up and stuffed away, but the BATT wire needs to hook to your big wire from the alternator.
I don't know that you ever told us what kind of rig you have. The alternator I am describing is called a SI unit and its little DA plug is on its periphery, not on the back. There is a alternator with a DA plug on the back, but this is a whole different ball-o-wax.
This is a simple wiring deal, I'm sure you just have something in the wrong spot...keep us posted.
