Here's something I recommend. First ... the strength of the signal coming from the cartridge is so small it will take 1000 years to adequately burn in the tonearm wire.
So ... I suggest getting some male RCA jacks, just cheap ones, and soldering some solid copper wire to them. The gauge of the wire should be the right size to fit into yout cartridge pin clips. See where I am going yet? Plug those RCA jacks into the back of your CD player and the copper wire into the cartridge pin clips (obviously remove them from your cartridge first). Then run the other end of your tonearm wire into your preamp/receiver, but not into the phono section. Just the Aux or CD in. Play away on your CD player on repeat for as long as you feel necessary (at least a couple of days) and that will burn in your tonearm wire better than any amount of vinyl listening will do. When you are satisfied it is enough, put things back the way they are intended to go.