That would have put considerably more strain on the handle...
Originally Posted by musigenesis
This is more like it:
With that pic the way it was, my scaffolding would have slid right off.
Unless you're Gordo, the morbidly obese bus boy, you should ought be fine.
Once lashed off snugly, there won't be much strain on the handles, and that shelf is solidly constructed steel.
The protuding edge from the windscreen to the hood, while narrow, could support some reasonable weight.
From a safety perspective, you'd be better served by a platform you needn't mince about on, and can exert force from a more advantageous angle.
FYI: I believe you can edit your post, delete an image, & then upload the rotated foto.