Here's the box that contains the Easy-Up Enclosure parts...
...and here are the parts. You provide the cut wood, and slide the parts into or through the various pieces, then screw the plastic parts to the wood to ensure a stable connection.
The chopsaw Spouse modified to cut wood. He swapped out the metal cutting blade for a wood cutting blade. Probably not what the manufacturer intended, but don't laugh. It works. (Mama still wants that compound mitre saw for the holdiays, ya hear?)
The required wood, all cut to specification.
The pieces would not easily slide onto the 2"x2"s, so I had to (gently, gently) tap with a rubber mallet to get the pieces onto the wood. See the groove marks the piece is scratching into the wood? Those are from little nubs on the inside that are supposed to help the plastic piece(s) grip the wood tightly. It's doing a dang fine job.
One of the pieces busted. There are no spare parts.
Even if I put together the rest of the enclosure, there'd be some serious weakness in the structure. I no longer have my receipt from Amazon, so I can't even return the box, nor the greenhouse cover (which was a separate purchase).
I am flummoxed.
Waiting for Spouse to get home to see if there's a way we can rig up a fix. Regardless, there's no guarantees that the other plastic pieces won't break as well. Aiiieeee!!!!