I am trying to replace my spark plug wires in my 2004 Stratus. I marked and took out the old ones then measured them to see that they are all the same length. 12.5 inches. The new wires are just about the same length as well 2 are 12.5 and 2 are 12 and 5/8 inches. The old set says 145a for first and 2nd wire 181a for 3rd and 171a for fourth new set says kw113, kw121, kw139, and kw141. The instructions only say to match up the length. How can I tell which plug goes where? The new plugs are Duralast model 4702 ignition wires.