Does anyone know?
I assume you’re talking about the Rhino ATV/Sled Box since I don’t have a Otter auger mount anywhere else on the sled(s).
So, assuming you’re talking about the Rhino Box, my sleds have a flat rack on the back of the sleds. All I did was mount the rhino box to the rack using the included hardware which amounts to u-bolts, backing plates and nylock nuts. Takes 15 minutes a box if you take your time. It really is very, very simple as long as you have a flat rack to mount to. If not, then you have to fab something up to create a flat mounting surface…or change out the rack.