WARNING: This page is about a different car, the 2008 Pontiac G5 and 2008 Chevrolet Cobalt. However, it is still accessible from the selected car via links, so may be relevant.
Fig 1: View Of Blower Motor Resistor
Courtesy of GENERAL MOTORS CORP.
Snap the blower motor resistor into the HVAC module.
Fig 2: View Of Blower Motor Resistor Electrical Connector