Perhaps it was the first day on the job for the person that did the brazing of the lower "pibb"! The one for the shifter band was oriented with the "lobes" up so they did the same for the lower one . I'm wondering if the "heart" shape of the pibb was design specific for a proprietary set clamps that had corresponding cutouts ? I'm going to say that it's my opinion that the SunTour clamp being used is designed to be mounted closer to the bottom bracket. I would mount the clamp so that the rim of the cable guide on the drive side was just barely above the bottom bracket. The upper edge of the clamp band might not even touch the pointy part of the pibb.