The part of the bottom portion of the SSQA is welded on.
Sorry I should have clarified better, they gave me the spacing for the bottom portion of the QA side to side and they gave me the dimensions for the top to bottom spacing. It made it easier to tack with it on the loader, which matched theie dimensions and the SSQA spec.
That technique will make sure it fits YOUR tractor but it might not fit another tractor, loader quick attach tolerances being what they are. They should give you a dimension per the industrial standard.
Sorry I should have clarified better, they gave me the spacing for the bottom portion of the QA side to side and they gave me the dimensions for the top to bottom spacing. It made it easier to tack with it on the loader, which matched theie dimensions and the SSQA spec.