Remove the spindle head cover.
Connect the new M12 CABLE [B] to the receptacle on the P-COOL ASSEMBLY [A].
Put the cable up the side of the spindle head casting. Make sure the cable goes into the opening  at the bottom of the spindle.
Disconnect the used M12 cable  from the connector bracket .
Note: On HMC machines, the connector bracket is near the back of the Y-Axis column. Remove the Y-Axis way covers for better access to the connector bracket.
Connect the new M12 CABLE [B] to the connector bracket.