I have trouble with starting my car..... I have all the wires hook up to the carburetor. ... but when I was reading the directions for installing the carb.. it said that the tube sticking out above the air mixing non was the time spark vacuum. .. witch would be the wire coming from the distributor right?? But the guy who install had a wire from the distributor to the plug at the bottom. ... So where do the wire from distributor go top plug or bottom...