SA10 setting clarification question

Reading through a previously posted SA10 thread this evening prompted me to get back into the owners manual I downloaded for my SA10 and the subject of "phases of the balanced connectors" has always confused me (however, I admit to being easily confused).

First, the manual explains that the USA system is pin 2 is cold, pin 3 is hot; versus the European system which is pin 2 hot, pin 3 cold; on both systems pin 1 is ground.

The manual states that "This unit employs the European system."

Then it goes on to state that "If a product that employs the USA system is connected with this unit [the SA10] via a balanced cable [which I am using], the signal may be phase-inverted. To correct the inversion, set the "Phase" to "Inverted" at the menu setting."

My SA10 is connected to my preamp, which is a Cary SLP 05, via balanced cable, and Cary is not saying in their manual whether they are employing the European system or the USA system so I am ASSUMING that they went with the USA system.

So as I understand the SA10 manual, I should be setting the Phase on my SA10 to ’Inverted’? Since my preamp is using the USA system? Is that correct?

ON EDIT I will add that when I first got my SA10 I remember going back and forth a couple of times between 'Inverted' and not inverted and I don't remember hearing any difference when I used the Sheffield Labs test disc on the "in phase/out of phase" track.  But it may be one of those sonic qualities that my ears/brain are not consciously perceiving but do make a difference anyway.  So I would like to have it set up the way the manufacturer says it should be set up, whether I am consciously hearing it or not.