I am confused by what part you need
,if you look at the steering pump maybe there is a removable male fitting left by a previous owner if so discard it and try your new hose, if its the fitting on the steering box in the ebay pic it might be the part you need,,,,,,,,,, but wait I need to tell you my current P/S unit adventure first
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I have a T/A box and a Saginaw pump and used it for years works good too but the hose was old and dry so bought a new line from NAPA (I think) installed it after a short run it started to leak at the steering box fitting and actually started a fire
put the fire out no damage done except I thought I was having a heart attack due to my Challenger appearing to go up in smoke (Serious too).............. Problem is that fitting in the pic is too tall for my new line and it will not get enough threads to tighten down, I think the actual problem is that the new steering line fitting on the box side is made too short , I have looked every where for a shorter fitting but have found nothing in fact I can't even find a replacement fitting its a hard item to find , wonder where the ebayer found it because I think he is way high, 26 dollars for a flare fitting geeeesh............