"devildog1971"......Your jack pump should be on the driver's side just in front of the rear wheel. You should have a mesh door there with a barrel key. Open the door and you'll see the dash A/C condenser. Unlock it and swing it open. Once both doors are open you'll see your jack pump. Right in the middle of the pump (on top) is a large nut with a breather. You remove this nut and fill with trans fluid.
With the three jack system, you should lower the front jack six inches. Have your spouse turn on the ignition key, which should make your jack alarm sound. Add fluid until the alarm quits.
That nut/breather on top of the tank is a bad design. It's too short and allows fluid to easily leak out. You can buy a brass 3/8" threaded brass nipple, about 3" long and extend that breather. This way you won't puke out so much fluid.
Don & Mary
2019 Newmar Dutch Star 4018 - All Electric
2019 Ford Raptor Crew Cab