Hello,
There is only one wire per terminal at the ammeter. If i remember correctly the positive wire from rectifier was attached to the wire that goes from battery + to ammeter (ignition key between ammeter and battery). It continued from the ammeter to the light switch and so on.
I believe that i have now connected the rectifier + to the positive wire that goes from light switch to rear/tail light, so its now kinda on the wrong side of the the ammeter than it was earlier, but since i had only two wires at the ammeter i switched them around so it works for now.
Went for a short ride finally today, works okay i will look forward to modify slightly the advance curves to get the best riding experience. I checked that dominator 99 has power peak at 7000rpm, so i set the rev limiter to 6500.