Question on rear rack mounted trunks

I wanted to see how you guys have been mounting these trunks to the plastic Polaris racks? Seems like they all use U-bolts for mounting to the steel tubular racks on most other brands.

I’m looking at the Quad Boss weekender in particular & like most of the others, it comes with a seat. Now I don’t plan on carrying a passenger, but for trail breakdowns & whatever other situation you may run into, it would be nice if this trunk was mounted securely enough to safely put a passenger in.

I know they say it’s not meant for passengers, but come on? They say it’s for resting on the trail, but if that’s the case, what’s up with the moulded arm rests, hand holds & what looks to be a super comfy ass fitted seat cushion….you might fall off your machine while taking a break? These things are def meant for a passenger, they just don’t want to be liable for the idiots that sure to get hurt while riding 2up on a std. machine.

If I had the tubular steel racks, it wouldn’t be an issue, but what are you guys doing that are running these trunks?