I tried to install two of these connectors on a large 2-piece sectional.First, they're very sturdy. I imagine that once installed on something with appropriate mounting surface, that they'd do a good job holding things together. However, in my case, the only available mounting surface for these connectors is 3/8" of an inch of wood area at the edges of the two sectional pieces I'm trying to connect. That's fine for the side with the triangle nub - it's right at the edge where you want it for…