I'm in the process of adding a Spal fan and their controller unit, I am thinking of using the post on the rear of my Powermaster 100 amp one wire alternator as the unswitched power connection. The "hot" side of the starter solenoid is full, not enough threads left to add another wire. I want to avoid at all costs adding a wire to the terminal at the battery. I can run the wire along the wire from the alternator to the solenoid, and could run the ground wire there to so it would connect at the battery ground to block connection. Does anybody see a problem with this?