Kohler C3-050 Homeowner's Manual page 43

Wrap toilet seat with plastic sheet to prevent water splash from the
toilet during testing.
The seat is activated by user sitting. To activate the seat controls for
testing purpose, facing the toilet first, then hold seat from right front
edge about ½ position by hand, hear the seat on right side of the
rotating shaft generate one "click" (gravity induction).
Contact
(inside)
Switch ON
The contact might not be activated
if customer does not sit all way in.
Note:
It is difficult to activate contact for light weight children.
There's clearance between seat bumper to toilet due to moveable
structrure design.
Kohler Co.
Clearance
Toilet seat downward
43 1278653-T01-B