Cabling with the cable needle in the back causes a right slanting cable. When used together with the left slanting cable you can create a variety of different cable patterns.
I will be C6B: Cabling 6 stitches with the cable needle in the back.
That is what it looks like before you begin:
Slip the first three stitches from your left needle onto the cable needle and hold it at the back of your work:
Knit the next three stitches from your left needle while ignoring the cable needle:
This is what it looks like after knitting your first three stitches:
Now knit the three stitches from the cable needle while ignoring your left needle:
This is what it looks like after knitting the 6 stitches and completing the C6B:
And when paired with the C6F you get this pattern. Simple chunky cable:
Hope this helps