I ordered the ecu adapter, dizzy adapter, and engine subharness from lowcash racing. I can hook everthing up right but i am not sure about the engine subharness. I am not sure if i need it or not,my car is already multi point . Can i just hook everthing up to the old wiring and not use the new subharness. If i do need it when i unplugg the connectors from the old wiring and connect the new ones i have a connector left over,what do i do with them do i just leave them hanging there or should i cap them off. If I can just plug everything into the old wiring that would be alot easier. Does anyone know what I should do, this is my first obd0 to obd1 conversion and i am a little stuck.Should i haveto be sodering wires and stuff or is it basic plug and play,any help? Thanks