Yes, youre right, they all move, this is waht i found out:
the leaking I knew was running along under the tube-nut between the tube and its nut, at the pump end.
You can buy a replacement nut RRP about $13, which amazingly to me, has an o-ring and a miniature internal circlip inside it.
Nut can only be bought genuine part, as power-steering repairer who told me of the whole thing admitted.
You have to cut the old one off,it cant be pulled off, with absolute care, not to even scratch the tube underneath, I put it in a vice and used a 4in angle-grinder, making several deep cuts close to but all the way through to, the underlying tube.
If you scratch or damage the part of the tube the o-ring rides on, it will not seal, you'll still have a leaker, and will be up for new PS presure hose complete, which are $150+ even non-genuine. Maybe EnZEd hose doctors can make an appropriate hose, for less, not sure.
with several deep cuts it was so deep could disintergrate it off with a whack..
sure enough, the little o-ring inside was hard.
if you could get the nuts off without destroying them, any suitable size and material rubber o-ring would solve problem, but seems to be no way to get them off, the circlip locks them on, the end of the tube would probably snap before you got it to slip off.
new nut assy pushes on with relative ease.
no signs recurrence leak.