I am not a expert on electric so this is a better safe then sorry maybe stupid question. I have a FLIER 250 amp boat speed controller.I received it from chris fine at fine design with connectors already in place. I wanted to test my system before putting it in the boat. I also have a 6s.22.2 volt 65c 5000mah battery also from fine design with connectors in place.I went to connect my battery to the speed control and when i go to connect the second lead no matter witch one i try first I am getting spark and a good crack noise. Is this normal? It is like touching the bare leads of a battery together. Is there something in the esc that would allow this connection to be complete? one lead is red and the other is black, one with male and the other with female connectors so it can not be backwards unless unless its conected to the esc wrong under the manufactures shrink wrap.