unless you have a 2014 model and get the BRP harness bar which has bolt on buckles and a quick release, they are all buckled on...
I think you read my post wrong because that is exactly what I was saying too. I bought one and it didn't fit....I had to educate 2 different dealerships before we determiend Can Am did not sell one for the 2013 and older Mavericks and Commanders....Not sure which bar youre are referring to but the new BRP harness bar that has attachments for the quick release BRP harness will not fit the 2013 Xrs. I bought the bar and returned it but kept the BRP harnesses. I plan to have 4 eyebolt welded to my UTV Inc harness bar. The issue is that the harness bar is about 3/4" - 1" too wide. The 2014 cage is wider at least at the rear. The instructions specifically says that the harness bar will not fit 2013 models. The catalog also shows that the bar is for 2014 or newer models. There is a thread on this forum that talks about this issue. Another member explains he had the same fit issue.
I have the 3" and they fit thru the seat fine.....I will say that they do tend to run your neck a bit if you don't have a collar on your shirt.....I am fine with it but my Wife and son complained about it at first.Ya I'm going to try that. Do the 3 inch harnesses go thru the seat back opening without issues wearing them? Like them rubbing your neck or whatever. I see the over priced brp ones are 2 inch.