This is out of my area of knowledge and I have never done this before much less know what the heck I would be doing but this is one of the many hits I got by googling "polarizing a 6 volt voltage regulator" .
thanks Cheif for the link.
Here is the answer I was looking for.
It must be "polarized." This is done by momentarily connecting battery voltage directly to the "armature" terminal, creating current flow, and magnetism, in the armature, and also the field coils. This is basically a short circuit, so don't let current flow for more than one second or so.
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