After doing some more research on this alternator, the website says it is not one wire compatible, but it also says it needs an external regulator. The attached pdf shows that there should be a wire going from the alternator to the F tab on the regulator. I have that currently and that is the way the previous alternator was wired. It also shows that it needs to be grounded. It is not grounded. Neither was the previous alternator. What size wire should I use for a ground wire and should I ground it to the frame or can I ground it to the engine?