Plugs into car harness at radio: Connects to the car radio harness Provides RCA connections for auxiliary jack: Enables retention of factory 35mm auxiliary jack Auxiliary input jack retention harness: Allows for the installation of an aftermarket radio Wiring harness for 2006 Saturn Vue/Ion: Uses existing factory wiring and connectors Power and 4-speaker harness: Connects power and speakers to aftermarket radio 30-pin plug: Facilitates easy installation and connection Allows for aftermarket radio installation: Utilizes factory wiring and connectors