I would be interested to see more pics of the stages of your Toneau Folding
Frank! It couldn't be easier.
Start with the zip unfastened:

Then fold in half to the end of the zip:
Fold in half, again:
Flip the folded tonneau through 180 degrees towards the headrest and then tuck the leading edge of it between the top of the hood and the underside of the fixed section of the tonneau:
Fasten the stud to hold everything in place:
No need to worry about fouling the seat-belt as the surplus tonneau is above the hood fabric.