Biohazard

RE: the wire terminals, they are "Packard 56" standard for most makes of the era, my local Napa used to carry them.

RE: the voltage regulator, find a replacement solid state version, much more stable and reliable. If originality is not important it does not hurt to convert to the '70 and up style if your alternator has already been converted. If your alternator has only one field wire terminal then you are stuck, but many over the years have been swapped to two wire connections. The original on your car had a single terminal that is connected to the output of the regulator. The regulator connection is positive voltage. The ground of the field is internal to the case. For the newer models the 12V from the ignition feeds the + field connection and powers the regulator. The - side of the field is controlled by the regulator. If someone has swapped a two field alternator but has the original regulator, the second field is usually connected to ground somewhere.