Kohler K-1913 Guide D'installation page 17

Position the Bath (cont.)
Make sure the screw holes in the bracket are closely aligned with the holes in the wood blocks.
Secure each of the wood blocks to the brackets using the original screws and holes.
Move the Bath Into the Stud Pocket
Install the outlet drain in the footwell to the bath following the instructions supplied with the drain.
Move the assembled bath into the final installation position in the stud pocket.
Kohler Co. 17 1128532-2-C