Ken's 545 has the same steering I think.
There isnt a rack and pinion under there though. The lines come from the steering motor to a plate that's attached to the bottom of the bolster then T off to go the respective cylinders. His had been damaged by a bump and only place for parts was CNH except the hydraulic shop told him he could fix the leak by means of a thin copper washer in the flare fitting. It worked.
Photo shows the lines connected to the T under there.
And yes, my back is wet from laying under there to get the photo. It just quit raining...