My 2016 came with the smaller battery and bracket. I wonder if the 2015 brackets can be used on the newer models or did Polaris put the mounting holes for the brackets in different locations?
I did check vendor websites and none seemed to offer the kit for the smaller Optima 75-25 battery at this time. Maybe time for a second hole on Slingmod’s hold down plate or a second bracket option from Slingshot Only? I would hope either vendor could still use their current bottom plate to keep their cost the same.