You should probably put fluid in the steering rack, with hoses looped or something so you don't ruin your rack.

When you're ready to refill it, lift the front of the car. Fill the reservoir, run the engine for just long enough to turn the steering lock-to-lock. Then the fluid will get all foamy in the reservoir. Wait 1/2 hour for it to settle, refill the reservoir. Do that again a couple times & eventually it won't foam any more.