My only experience with cables is this rule of thumb: cables are crossed when the RS of the work is facing you, and the cables are usually knit stitches. On the WS of the row...you will not cross the cables. You will "knit the knits, purl the purls" as they present themselves.
So if a 3x3 cable (C6F) reads like this...P2, C6F, P2....then on the WS you will work those 10 like this:
K2, P6, K2.
That's been my experience. And if GrumpyGrammas link to that Weskit is correct, FOR SURE that is how you'd work those 10 stitches.
Oh, BTW...any cable like C6F is usually flanked by 2 purls. It helps set off the cable.