I do better with smallish jade cuttings. I would cut the broken piece in half. Plant the bare lower part with the roots down in soil. (Yes, a bare piece of stem will grow.) Peel the bottom two leaves off the top part, then plant it into soil. I'd give them their own pots, but they might be OK where they are. With smaller pieces they will be easy to stabilize in the pot until they have their own roots. Just one or two nodes down in the soil actually work better than a long piece, at least for me.
