In my experience the hoses are the weak point. try this, clean the hoses with brake clean until they are totaly clean, the hose should then have a grey/black color. Drive the car, if the hose has turned black, it it leaky.

If you suspect a pressure hose. clean every thing, start the car and turn the steering wheel hard over against the lock and hold it there for a few moments, a pressure hose of fitting should have leaked enough to be dectectable.

Its hard to see down in there, You just have to keep at it, eventualy you will see something.