mystery connector

[wheresmycoupe]

Anyone know what the 2 wire 1 plug is under the intake manifold, between the water necks?? Dual cam Ka

https://imageshack.com/i/eyXn9KnBj

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Knock sensor sub harness.

[ZenkiKid]

Knock sensor.

[wheresmycoupe]

How important is it? Would it prevent the car from starting? I've read people just unplugging it. I don't have a connection on my main harness.