Oops, you're right. It's even the same seller that I thought was poor quality in the auction that I found first.

I still think you'll have to ask the seller... "which one works for the older small rear cargo rack (Trail 50, Trail 55 & CT200), and which one works for the newer larger rear cargo rack (CT90's & CT110's)?"
I believe he is referring to his bracket that holds the buddy seat in place, probably between some of the existing hole/slots that are in the rear cargo racks.

Unless another member knows the answer.

Paved roads, just more needless government spending...

I pick up my mail in Santa Barbara, California, USA.