Here's someone's golden opportunity to unload a set of those straight pieces of metal they paid hundreds of dollars for instead of going to the steelyard and paying 40 bucks.. when they got them they figured out that have to be welded in anyways......
The contour of the floor thats cut into the connectors saves me a lot of work. I have the tools and capabilities to cut that contour into a piece of box tubing but time is something I’m lacking. The time saved is more than worth the cost to me.