Abstract: A method and system for cooling a mold, including the steps of providing fluid flow connectors insertable into a mold for conducting the coolant into the mold. One of the connectors is made in one-piece and includes a threaded stem which threads into a mold opening, and that one-piece also includes two threaded openings which are disclosed transverse to the length of the stem and which align with passageways in the mold for attaching to two tubes extending in the passageways. The system in method is arranged for the alignment of the threaded openings with the passageways while the stem is fluid tightly threaded into the mold opening, and all of these connections are made on the interior of the mold.