No it's factory... I have one just like it. It mounts on the front with 2 rods on the quick attach plate (also used for the new style snow/dozer) or on the frame of the 14/6 "angry" style tractors- for the 3 point mount, there is a banana shaped piece that slip in and the top rod goes thru that, and attaches to the top link of the 3 point.
This is the tote box mounted on the front quick attach plate
Front mount quick attach plate (the guy had this too, I bought it for a second one)
The tote box on a 3point hitch
The snowblade/dozer that mounts on the quick attach plate. (Which I have too)