Frank! It couldn't be easier. No need to worry about fouling the seat-belt as the surplus tonneau is above the hood fabric.
Well Ken, I needed the dealer to show me how to get the Toneau to fit as I was after a replacement. It looks a tighter fit than yours though.

Zip open and Back Latches unpopped.
Fitted the left side Poppers & Tenex first including the front scuttle side & middle fastenings.
Then Heave across the back edge to fit the side back popper (the one I could not do up).
Then do up the right side poppers etc right to the front.
Then do the Zip Up and clamp down the back edge last.

Your folding method - My first attempt. - Rear View.

Front view - First Attempt. - will have to do better. It is well clear of the Seat Belt as you predicted.
I have left the full Toneau zipped up over night to allow it to stretch a bit. I will have another try tomorrow.