That looks like a good setup for hardening them off. It provides some filtering of the direct sun and also provides some protection from the wind while still allowing a steady breeze if there is one.

I would just make sure on the first few days to either make sure they get very little to NO direct sun or limit their exposure to a very short duration.

When are you expecting to be able to get them outside permanently?

Bruce

It's only going to be under 50 degrees one night this week according to the weather channel forecast , so I plan to keep them outside whenever I can give them close supervision. Hopefully in about two weeks they can do their full time outdoor thing !! The conditions are perfect today though ! Dappled sunlight and a steady, gentle breeze.

Yep, sounds good. Just keep in mind that "sunburn" isn't immediately evident. It is a lot like people. The red skin and pain show up later that night or the next day.
Bruce