It could possibly have 5pins instead of just the three.should I assume that the 2extra pins at the back are just for stability or are they like an on/off deal like on the one below or is the one belows on/off function seperate from the 3main pins? With the one below if you labelled the pins 1-5 with one being the most left going counter clockwise and the 3main pins being 2,3&4 you would run the positive thru 1 out 5 then to either 2 or 4 with 3going to the motor+ right?