More or less, the white plug that you need to unplug is located on the ODB2 cable under the drivers side dash, you should see a small hatch with the plug attached, pull the cable through and you will see a plug, just unplug it and turn the car on to reds and you will hear the pump start to turn. Make sure you open the bleed nipple on the back of the transfer case a fair bit to get the fluid moving. IT WILL MAKE A MESS so be prepared as it will go through a fair bit. Having 3 people there will help the job along, one person at the nipple, one at the rear topping up fluid and the other turning the car on and off. I use Matic D in the atessa.
Also the nipple at the motor end seems more like a drain nipple as it is gravity only and does not require the pump to operate in order for fluid to come out.
Mike.