I just bought a new set of ignition wires for my 1986 560SL Mercedes. I also bought the angled connectors for cylinders 3 & 4. All of the connectors to the spark plugs on the new set are straight connectors. How do I change out the straight connectors for cylinders 3 & 4 to the angled connectors. It looks like I would have to cut off the straight connectors and install the angled ones but do they get crimped or screw in or what?