I'm running a 58 pan w/ generator and mechanical reg.(that I think is fried). I have 3 solid state regulators that I believe are new but none are wired for generator. One has a 4 hole female plug (Bstyle), one is round 2 prong male plug (Fstyle) and the other is 2 prong male plug (A or H style not sure at the moment). Each has a battery lead wire. (I of course would need style G) Since there are no markings on them and you order by the plug style, I wonder if each regulator is preset for the year models specified or are they the same internally with just a different plug. If they are the same internally is it possible to cut the plug and wire to generator? If so since all wires are black how do you know which is field or armature? Has this been done before or is it totally imposiible? I'm fairly new at this and just hoping I actually listened to and maybe remember what my late husband taught me. Thanks to anyone who might know.