I have seen them where the holes had screw in eys in them. The three arrows were each in a separate eye about two or three inces apart. All were "nocked on the string" at the nocking point together on a strung bow. This created a fan effect for the display. Each arrow had a different point, Broadhead, field point, and blunt.
I do't know if the screw in eye version were done by Bear, or mayber some dealers did their own thing.
I'm sure there were variations on this.
I have a Kodiak Magnum Type I Dogleg the has a small hole drilled about one inceh below the upper and lower nocks. These holes were used to mount them to the wall as a diplay with wire or like zip ties. Mine once hung in the GREYLING museum.