The construction of the block is 6 mm ply laminated to 19mm birch for the lock section. The tloc is attached with a 1/2" hole with a counterbore from the back side to the thickness of the tang to the pivot surface of the tloc. That was it "clicks" in.
I did something similar with the foam cradles that held my 118" rail in the packaging. I taped the foam to aluminum j-hooks that I made from aluminum flat stock and hung them from my suspended ceiling.