Oh wow, I hadn't seen the photos when I first replied - that's a huge thermocouple! Assuming the wires are chromel and aluminel all the way back to the pigtails, you can dispense with all that metal on the end and just use the wires themselves.
This is the technique I use to attach the thermocouple wires to my extruder nozzle:
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www.techbriefs.com]
Wade
