Heater Cartridge Wiring

I have a CR-10S and I had a print fail in a way that got melted plastic on the heater cartridge. I couldn’t get it cleaned off sufficiently that I thought it would be safe, so I bought a new cartridge.

In noticed; however, that both the original cartridge and replacement use the same color wire for both wires coming off the cartridge. Is there a good way to tell which wire is which? Or does it not matter and that’s why they are the same?