ok, i think i figure out how to ask this question where people will understand my speak. to anyone out there who has a 99 to 00 civic si. i notices the main engine wiring harness looks like it only has two plugs that plug into the ecu. dosnt the ecu have three places to plug into? and do the plugs actually fit, or just one? where does thethird plug come from? i know this question is kinda weird but please trust me its relevant to what i am doing. i have a 99 b16b complete wire harness with two plugs, but only one plug will actually fit into the ecu, the other plug wont, and the ecu has three ports so im wondering if there is some other piece of the harness that wasnt included or something. i check the number on the ecu by the way and it says it the right one. just confused. thanks for the help guys