@XRWoody You could be onto something! If you look at the SC64 panniers and/or frames you'll notice one side has a different profile to the other whereas the SC58 panniers and rails are mirror images of each other. If both your sets of rails are the same they are both for the SC64.
@BirminghamOwl Honda panniers, rails, top box and top box mount are not compatible with Givi/Kappa panniers, rails and top box and top box mount.