In order to wire a single towel warmer to code, you must follow the kit and video. In addition, you must follow Authorities Having Jurisdiction (AHJ).
1 – M10-1 – 10mm Tap
1 – Undercounter Connectors
1 – 3/8″ Flexible Metal Conduit (Alt: 6′ 3/8″ whip and remove the wire)
1 – 3/8″ Conduit Connector
1 – 2″ x 4″ Metal Junction Box with 3/8″ Knockouts
For a visual demonstration, please view the video below.