I tried all of that. Tried hooking the winch from my two seater up to pull the roll cage out a little and then tried to rachet strap the bar together a little. Closest I could get it was about 1/4 of an inch away from popping on. Was banging on it at the same time but it wouldn't pop in. Had it cut and re-welded. Everything works fine now and it is installed. Shouldn't have to go to those lengths though to get something to work.Just last week I helped a buddy install both of those same bars on his Max so I know exactly what you're talking about. We initially thought that both bars were oversized by about 3/8" and would never fit but we kept working it and with a large rubber mallet both popped on. They make it diffictult to install by the way they rotate the clamps to the point of where they have to be 'snapped' on which is not easy to do with a steel bar. But don't give up. On the front bar we had to pull it almost on using a ratchet strap that we tied to the grab bar. Once it was almost there the mallet finished the job.
Also, here's a tip I learned while doing the harness bar (UTV Inc) I installed on my 2 seater last March. Run a tap through the threads to clean it up because the powder coat blows a lot of paint in there. I also applyed a small amount of anti seize to the threads. It makes tightening up the clamps a whole bunch easier.
As for UTV Inc, well I'm in the process of installing the new UHMW skids I bought last Friday. Was going well until I got to the front corners and couldn't get the self tapping screw to sink into the frame. Turns out the frame turns upward at the part of the car so I needed longer screws which were not in my parts bag. I stopped by the store today and they gave them to me which wasn't a big deal to me since they are close to work. So hopefully I can get that job finished tonight because I really like the skids. My biggest complaint is the price of this stuff, almost $500 for some plastic. I'd also say that front harness bar is a bit cheesy because it seems they got lazy and decided to just weld a bracket on instead of bending the bars and making it match the back bar.
Anyhow, to the OP, beat that bar into place. You've got nothing to lose!