Trump didn't win, but according to the article they tried to deliver their votes as if they were legitimate electors.

In casting their electoral ballots for Kennedy, the three Hawaiian Democrats certified they were the “duly and legally qualified and appointed” electors for president and vice president for the state of Hawaii and that they had been “certified (as such) by the Executive.” The Hawaii electors further attested: “We hereby certify that the lists of all the votes of the state of Hawaii given for President, and of all the votes given for Vice President, are contained herein.”

Two of the three Democrat electors were retired federal judges, William Heen and Delbert Metzger, and Heen personally mailed the Democrat electoral votes to Congress on Dec. 20. In fact, the envelope containing the certificates, further attested: “We hereby certify that the lists of all the votes of the state of Hawaii given for president … are contained herein.”

Ten days later, on Dec. 30, 1960, Judge Jamieson held that Kennedy had won the election. In so holding, Jamieson stressed the importance of the Democrat electors having met on Dec. 19, as prescribed by the Electoral Count Act, to cast their ballots in favor of Kennedy. That step allowed the Hawaii governor to then certify Kennedy as the winner of Hawaii’s three electoral votes and, in turn, Congress to count Hawaii’s electoral votes in favor of Kennedy.