Kohler 27121-4-SN Guide D'installation page 8

Screw
Cold
Hot
Solder
5. Secure the Valves
Turn the threaded ring up each valve body until finger tight, then
use a Phillips screwdriver to securely tighten the threaded ring
screws.
Clean away any excess plumbers putty from the deck.
Connect the hot and cold valve bodies to the appropriate water
supply lines.
Solder the connections.
1347030-2-A 8 Kohler Co.