Hi .I just installed a battery in my boat to run my trolling motor.I had the trolling motor plugged into the Marinco plug when I was putting the cables onto the battery and I noticed that I had fire sparking when placing the ground onto the battery.The trolling motor has remote with a foot control and a hand held one.If I unplug the motor from the boat I get no spark.Is this an indication that my motor is pulling power when not in use?