IR cable for XS2, the hard way

Hi , I would just like to benefit others of my experience with IR cable between XS2 and XS3. We are suppose to use a MONO cable, wich are surpringly not so easy to find.
I read that stereo could work (on one channel of course).
But I really can tell you that 4 poles (L R G and Mic) wont work. I read about everything I could found on the different topics on this site, but I did not read about this black hole.
At this point everything works fine for me. And by the way those 2 components work very well together and what a sound.
Gizmo from Quebec, CANADA.