Tuning up my 1993 Q45

[jsa2000]

I changed the spark plugs on my 1993 Q45. The engine is still riding rough...like its missing a cylinder. I should have changed out the wire harnes also but did not at that time. I am having difficulty finding the proper harness or even knowing what it is called. I don't want to purchase the wrong harness. Does anyone know what he wire harnesses are called that come off each side that plug into the individual coils?

Thanks,