That's common on cat 1 implements. The lower hole is 15" center to center from the bottom pins which is what is used as the standard for Quick Hitches. I believe the other is 18" on center.View attachment 628487
I recently bought a used rear blade for moving snow. The blade has two holes for attaching the top link. I'm just curious as to which I should use? Pros and cons of each? Is the top one for Cat 2 and the bottom for Cat 1? Are they for different types of quick attach mounts? Thanks.