I am putting an 04 2zz from a vibe gt in a 03 base model vibe. I think the the parts store got me the wrong ECU. My ECU only has four plugins. There is one plug that doesn't have a slot which I am guessing is my VVTL-I plug. Its grey and only has 3 wires. Can anybody tell me if this is the wrong ECU or a way for me to verify that is is?