Slightly different as I have a 4 seat, but I made a removable bar that mounts on the rear window brackets. Dead posh, with rose joints either end so it can be tightened up.

Tonneau cover folds underneat and then rests on the bar allowing proper operation of the belt.
![[Linked Image]](https://www.tm-img.com/images/2022/08/08/IMG_20220808_122502.md.jpg)