Ok, so we're talking a HO MC cartridge with an output impedance of 134 ohms. It's pretty much the same as any MM but since it is a MC I don't know if cable capacitance is much of an issue. Perhaps just try to keep the capacitance as low as possible without going nuts. Sean makes a good point. The wires in the arm are adequate but probably nothing special so not worth putting an expensive cable in the chain. You haven't said what cable you're using now, it's probably just fine, but it is always worth trying different cables. Just set yourself a budget amount and try to stick to that.
Best,
Dan
Best,
Dan