So as you can see in the 1st pic. I hand stitched along the side I coloured in black.
I did 1 side 1st away from the rope.
Stitch roughly 10mm .
Once you have done a side put it over the rope and stitch the other side.
Then to reinforce it all I wrapped the webbing around a couple of times as in 2nd pic.
I used enough to be able to slide the ball over just
To make this easier I stiched the end of webbing to the rope just enough to hold it in place then I could wrap it around easier.
The once it's wrapped around I stiched it so it does not come undone.
All you have to do is thread through the webbing and the rope on the middle.
Just keep stitching until it all hold. Doesn't have to be tidy as you won't see it.
Sorry for the crap explanation
Btw tested it today... Tarifa winds and works a treat.