Easy enough to burn in tonearm wire. Just get 2 make RCA jacks. Solder some solid core copper wire to them of a sufficient gauge to fit into yout cartridge clips. Plug those RCA jacks into the back of your CD player, the new solid core wire into the tonearm clips, and the TT tonearm interconnect into an AUX slot on your preamp (not into the phono stage).
Put your CD player on repeat for a week, and you will have burnt in your TT tonearm cable and interconnect far better than you will ever achieve by playing records.
Put your CD player on repeat for a week, and you will have burnt in your TT tonearm cable and interconnect far better than you will ever achieve by playing records.