1 wire gets switched 12v source
1 wire is charging sense wire (I would route this to the + side of the battery)
large wrapped wire is charge wire - should be 4ga. wire and a fuse should be choosen based on the amperage output (40amp - I would do a 45amp fuse) - it should be no more than 1ft from the battery..
I have a Mancini alternator bracket and a 120amp toyota alt on my 383 and this is how they are wired - if the car has the stock voltage regulator in it, unplug and remove it, wrap the plug in electrical tape...
FYI you can buy replacement pig tails on ebay - I got one for mine for $10 shipped
