Ive never seen a Power wire with a direction on it. I used to work at Team Electronics in Escanba, MI as a installer. Patch cables are a different story. Stinger loves to have a certain direction lower impedance that way. Get a fluke and check your resistance threw your power wire.
if its alot reverse the direction. Alot like im talking 1k ohms or something around there. Any more ?'s just ask