Post your 10 second combo

Hey,guys,I am new here and terrible with computers,so I am just going to ask a question and hopefully someone can help me! I have a 71 Demon,418 stroker,on nitrous etc.went to Castrol raceway in Edmonton Alberta 2 weekends ago. When I went to get teched,my master cutoff switch wouldnt kill the thing.I got help from Darth who is on this site.His father gave me advice over the phone.The alternator is feeding power back through the wiring harness and wont allow me to kill it with the switch.Rick(Darths father) said I could run a wire from the alternator straight back to the battery. This is acceptable but, I am scared that this situation is going to cause a short and burn me down.Any advice on what is causing the alternator to do this? I basically only changed 2 things in the electrical system this season;1.Transmission brake was added,2.Now triggering the n20 off the throttle.Cant find melted wires,and everything works great,just cant shut the car off with the master.Help!!