Roadster - tonneau cover adjustment

[bogie]

So the first niggle with the Roadster. Just noticed with the roof down the tonneau cover is not fully closing on the drivers side. The leading edge is sitting 5mm proud when closed.

Anyone else had this and is it a dealer job for adjustment or are there some easy to adjust fasteners accessible ?

Ive looked in the workshop manual, which covers replacing the hood completely, but cant find reference to fitting the tonneau cover.....

TIA