Thanks Evil Twin mine is a little bit different I have the blue wire the black ring wire and there is a red ring wire that is bolted to one of the heavy duty terminals on the solenoid. Do you know if the main battery or aux battery positive goes to the one with the red wire attached. I have already spoken with GSL they have no paperwork for this model as you say it is superseded x two now they were very helpful in trying to locate instructions for me.

Regards Bob