Start out with the car in park.
If you're dropping the pan and are changing the filter I believe it takes about six of those liter containers.
Put in about 4 1/2 containers, then start the car and cycle it through all gears holding holding it in neutral , D, R,1,2 for 10 seconds or so.
When the transmission temperature reaches 35° C. Continue to add fluid until it runs out the drain hole.
ATF level is correct if a little bit of fluid still escapes at the ATF check plug between 35 and 45°C.