WARNING: This page is about a different car, the 2016 Honda CR-Z, 2015 Honda CR-Z, 2014 Honda CR-Z, 2013 Honda CR-Z, and 2012 Honda CR-Z. However, it is still accessible from the selected car via links, so may be relevant.
Fig 1: Identifying Seat Heaters Component Location (1 Of 2)
Courtesy of AMERICAN HONDA MOTOR CO., INC.
Fig 2: Identifying Seat Heaters Component Location (2 Of 2)