My Mini Lite is similar to yours. Brought it home from the dealer (2hrs away). Backing into my driveway, got the truck almost 90 degrees to the trailer, heard a "pop" and the chains broke the bar they were attached to. Obviously, they were too short. I wasn't going to drive 2 hrs back to the dealer without chains, so I had it fixed nearby. They welded a new rod across the frame behind the busted one and gave me new, LONGER, chains. Kind of makes you wonder how well it would have held up if it had actually come off the ball.
1988 Coleman Sequoia - popup (1987-2007)
2012 Roo19 - hybid (2012-2015)
2016 Mini Lite 2503S - tt (2015 - ???)
2011 Traverse LT, 3.6L, FWD
2009 Silverado Ext Cab, 5.3L, 4x4, 3.73
2016 Silverado 2500HD Dbl Cab, 6.0L 4x4, 4.10