Neotech NEI 3001 III

So, I am going to make an attempt to build an interconnect cable. I am going to use Neotech's  NEI-3001 III cable. After reading the write up on HFC's website for this cable I interpret their info to direct me to connect the the copper sheathing & blue ground  to the RCA plug at the source end of the cable and not the preamp end; in my set up that is a DAC running to the preamp. I assume the arrows on the cable still point towards the preamp. Can anyone explain the mechanics of this? Is there a correlation between the sheathing connected at the source and the charge going in the other direct or are the 2 unrelated?
Thanks,Rick