I would run the blue wires for the signal/tip and use the white wires (not the outer ground shield) for the ground/outside of the connector. Actually, for the best shielding against interference, I'd do blue to signal/tip, white to ground/connector, and then also tie the ground shield of the Canare cable only to the connector ground on the soundboard side (no connection of the Canare ground shield at your recorder/preamp side).