I am trying to put twin motors in a p-38 using turnigy 42/40 with hobbyking esc,s 50 amp 2- 2200 40-C turnigy lipo,s hooked esc,s to reciever #3 with y harness. tested both motors individually they worked fine. plugged in left motor to left battery. plugged right motor into right battery powered up motors and fried right esc. What did I do wrong.