Help on cable pattern chart

Hi everyone new to site

Have a chart for cable afghan 308 stitches all on one cable.We have 5st, place pm 4st pm,4 stitches are section A,then repeat sec B has 28 St place maker after each 28st section, section C has 14st place marker.then last have St. Starting in row 5 I have 2sts cabling over lapping A and B , B and C not sure what to do . If you would like to see pattern please email can’t make picture small enough to.
Thanks for any Help

Welcome to the forum!
There should be a key with the chart that defines the cable crosses on row 5. It looks like they are 4 stitch cables with either 2 sts held to the front, knit next 2 sts, then knit 2 from cable needle (a left cross) or 2sts held to the back, knit next 2 then knit 2 from cable needle ( a right cross).
Can you tell us the pattern name or give us a link?
It’s fine to post parts of patterns but we really can’t share patterns because of copyrights. The portion of the chart is just fine.