One thing I was wondering about. In a couple of videos on YouTube, they bench tested two solenoids similar to mine, with the exception that their small posts were bolts, instead of spades like mine. In those tests, they grounded the metal mounting bracket instead of the small "S" post. They got the solenoid to click. As you all know, on my solenoid, I had to ground the "S" post. Why the difference? Also, why do they refer to or label the small post as "S" if it is a ground post? Why don't they label it as "-" or "ground?"