I have never done a cable pattern. In my new sampler for an afghan. Row 5 says P3 (c6b,P3) 5 times. I have viewed the Video on cables but dont understand the c6b abbreviation.

Here is how you do a C6b (Cable 6 back):

Slip next 3 stitches to your cable needle
Hold to back of your work
K3 from your cable needle

Your pattern should have an explanation for all your cables though…so that’s kind of weird. :??