Dual field alternator in single field vehicle

Hi all,

The front bearing in my alternator is starting to squeal. The '67 'cuda is wired for single field alternator. I can only find a dual field replacement from the common sources. I have to have the car driving before Sunday.

What modification do I need to make to use a dual field alternator?

The replacement I bought has two terminals labeled FLD. One looks like a normal spade connector, but the other does not look the same.

What do I do?

Thnx, Mike in FL