ignition problems

Ok, so i ordered a new electronic ignition wiring harness, it should be here next wednesday or thursday. I have looked at all of the diagrams and looked alot online trying to get to the bottom of this, the green wire from the voltage regulator runs from the voltage regulator to the back of the altenator to one of the field terminals, the blue wire runs from the other field terminal on altenator to the voltage regulator then it ties into the ecu power wire. I dont understand why this is wrong? it may not be the way dodge wired it originally, but why wouldnt it work? it says one wire oes to voltage regulator to altenator and the blue wire comes from other altenator field terminal to the voltage regulator and then off to an ignition power source, or just plain old ignition. Why would it matter where the voltage regulator gets the 12v ignition from? as long as its getting a 12v ignition source you'd think it wouldnt matter where as long as it is getting a 12v ignition source?