The hardware used to connect it is 1/8th ply root doubler, and a 5mm bolt running through a bearing. One side is shown on the original plan, obviously there are two one each side.

I have attached the side view of what it all looks like and you can see it sits a few fractions of an inch above the jet tube and all that heat!

It wouldn't be hard to make the whole lot pivot/hinge along the centreline of the aerofoil using the joining bearers as hinge/pivot mounting points.