monoblock hook-up very dumb question, sorry

Hi. Again. This is a somewhat embarrassing question. And I have searched the threads with no luck, probably not entering the correct or accurate search info...

I am buying a pair of Rogue M120 monos from one of our esteemed Agon members....but as I prepare, I do not know (get this), how to run the ICs from the pre to each amp....

Is it:

Single positive RCA IC from ARC LS8 MkII to one amp and
single negative RCA IC from pre to other amp?

If that is the obvious hook up, how then does polarity work with monos?

It can not be more simple than that, I think I am missing something!?

Greg