Unless yours is different, all these Kia/Hyundai transmissions are filled in the same way: up until fluid trickles out of the level plug, with the engine running and the transmission fluid at the correct temperature.So with motor running/trans spinning in park it will drop down by 1.25qts on the level to be at or below that check plug?
I actually thought about that for next time. Fill the 3 quarts through the check plug and then only suffer through 1.25 qts through the top.
If doing it as you describe works, I can just use my quart bottle pump and do all of it through the check plug.