Seat Assembly: Inspection: Notes
WARNING: This page is about a different car, the 2014 Mitsubishi Outlander. However, it is still accessible from the selected car via links, so may be relevant.
Connect the + terminal of the battery to the power seat connector terminal No. 2 and the - terminal to terminal No. 1, and check that the power seat works normally.
Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.