Review (2/5): It's not all that universal ...
1. All the parts aren't in the box. There are 4 silver nuts/bolts pictured that are for holding the mounting brackets and those were missing. Ok, that's not a huge, hairy big deal BUT ...
2. If you are looking at the bar that attaches to the back set you'll see that there are slots where the mounting brackets would fit. Those slots were not wide enough for me to mount on the back seat. So be sure you know what you are ordering ... if you expect it to fit your cart, please make sure to find out if the "universal fit" is universal for you too.
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As an update, it looks like I was able to return the seatbelts ... hope that everything turns out ok with the return.
I am going to see if I can return the seat belts.