I need to replace my solenoid. Its a 3 pole. I see that using a 4 pole is not a problem and to just leave the post vacant. My issue is I have located a female pin from the voltage regulator the same size as the male S and I posts. Could someone please let me know if I should hook this up to the solenoid and maybe why it was disregarded in the first place. All the schematics I looked at for 4 pole hookups shows I post going directly to ignition not through the voltage regulator.