Kury Passenger Pegs

So I bought Kury mini boards for me and Kury Dually ISO pegs to also replace the passenger pegs. Mini board install went fine (except those little cotter pins). The rear, not so much the male mounts are not wide enough for the "ball and indent" mechanism to work, and the hole for the bolt is too big. Anybody go through this? Am I missing something?
A little frustrating since I emailed Wings Stuff and asked them specifically which pegs were "direct replacement" for the rear pegs. Their email response was "If you type in PASSENGER FOOT PEGS in the search window, then go to the left side of the page and select F6B it will show what's available."
This is what I did. I will contact them this week, I am just making sure I'm not missing something here.