Kohler 114749-9-AE Service Kit Instructions page 7

Valve Lugs
5. Align the Flush Valve
Insert the screws into the holes located on the inside of the flush
valve.
Thread the valve lugs onto the screws.
Position the valve lugs so they face inward.
Insert the flush valve into the tank bottom hole, and align it in
the same position as the original flush valve.
Swing the valve lugs outward so they extend under the tank hole
bottom edge. Hold the valve lugs in place with a needlenose
pliers. Evenly tighten the valve lugs with a Phillips screwdriver.
Do not overtighten the valve lugs.
Kohler Co. 7 114749-9-AE