420A 2G Mitsubishi Eclipse GS Sensor location?

[SgtGoldfish]

So im having a problem with my car and i know its this plug in that has to go somewhere but where does it go? Intake?
Because i got a aftermarket.. please help i need to know what this is and where it connects! Thanks

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[DirtMcGirt]

According to the FSM, on the 420a engine bay harness there are only a few 2-wire connectors that are Grey rather than black, the air intake temp sensor and the back-up light switch (M/T only) among them. Due to its location, I'd suspect that is for the back-up switch on the transmission (assuming you have a 5 speed).