Kohler K-706000 Guía De Instalación Y Cuidado página 17

Groove
14. Position the Header
NOTICE: The labels on the header must face the outside of the shower.
From inside the shower, raise the header above the cleats.
Tilt the header and lower it onto the cleats as shown.
The tops of the cleats should fit into the top inside groove of the header as shown.
Rotate the header in place until it is flat against the cleats.
Kohler Co. 17 1314827-2-B