what ive done is just run the wire from the knock sensor straight into the ecu. its gonna be kinda tough getting the pin i think. i tried getting one but had no luck. you can either find one from a wrecked civic or the dealership should have a big case with different pins in it but my local dealer didnt have the pin, so possibly you can order it from them. you might also be able take out a pin from something else that doesnt get used?

its kinda ghetto, but i just stripped the end of the wire and shoved it into the back of the plug and put it into the ecu. worked fine on both me and my friends swaps but ide try and get the pin first