Very well could have been since a lot of the main lines on the machine are banjo fittings. I just can't find any info on the line set or lever other than what is mentioned in the WSM.I wonder if the original connections were meant to be banjo style fittings. M12x1.25 seems to be a pretty popular banjo bolt size.
This is the fitting I think I'd try if I were to start over. I actually order two but haven't swapped them on yet. Its aluminum but according to the WSM there is only 800 PSI max on the aux spool so I'm guessing it would be just fine.
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4AN Flare to M12x1.25mm Thread Straight Fitting Aluminum | eBay
4AN flare to M12x1.25mm threaded fitting. 4AN to M12 x 1.25mm Fitting. Made in Wichita, Kansas from aerospace grade, USA produced, billet aluminum. Bare aluminum finish. Prop 65 Warning!This product can expose you to chemicals including lead, which is known to the State of California to cause...
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