As long as the solid yellow wire, and yellow/black wire are both going to the right places on the regulator, it looks correct. Sorry, I don't know too much about the regulator's function and effect upon the alternator charging, but perhaps that would be something to look into as well.
WORTH, I have a wiring diagram that someone showed me, but it doesn't show exactly where the wires go on the alternator. I know I have all the right wires GOING to the alternator, but don't konw if I have them hooked up to the correct posts. Does your diagram show what posts they go to?
your posts are marked
just match the wire color to the post, I think the white wire is the field and it looks right in your picture, but it also has to be on the "F" terminal on the regulator