Pretty easy fix. Just needed a picture for reference to see where each of the rack supports went. It all fits together pretty intuitively if you take it slow and look at where the insertion points for all the parts are.
I did considerable shopping around before purchasing. Other direct from manufacturer sites I found were more expensive. There were plenty of way cheaper options, and they all had 4 star and higher reviews, but reading through the reviews it was clear the parts were cheap and unreliable, didn’t fit properly without modification, and broke quickly. Glad I didn’t go with them.
Hopefully these parts will last several years but we’ll see.