I know this has been addressed before, but it was awhile back. If you don't know most of the kill switches are N/O switches. Works great on older quads, will work on ltr but the computer is highly sensitve and everytime you pull the tether you are sending an electric shock to it. I bought the proarmor, looks great works awesome but is N/O, my fault for not checking it out first. Best way to put in a tether is buy a N/C switch. I din't buy this one, but the pingal is a 2 wire tether that is N/C and is the easiest to put on. Take the two wires from the tether and splice them into your orange and orange/white wires that went to the on/off switch. Tie clutch wires together and your done.