Which way is up on the waistband pieces?

The waistband pieces are curved, and the instructions warn to put them rightside up, but I see no markings to tell me which side is up. It doesn't seem intuitive, since I'm not clear whether the band is intended to sit at or above the waist (I want it at the waist, ideally). The layout suggests one piece should curve up, the other curve down. Kind of stuck here, hoping for some help!