Conn. Gen. Stat. § 9-175

(b) In the case of a write-in candidate for President of the United States, such candidate may register his candidacy with the Secretary of the State by submitting his name and the names of a vice presidential candidate and candidates for the office of elector in a number not exceeding the whole number of electors to which the state is then entitled. Such registration shall be on a form prescribed by the Secretary of the State, which form shall include a statement of consent to being a candidate by each proposed candidate for elector and by the candidate for Vice President. Such registration shall not include a designation of political party. A candidate for President may register at any time after January first of the election year and not later than four o'clock p.m. on the fourteenth day preceding the election at which the offices of presidential elector and vice presidential elector are being contested. If a candidate has so registered, a vote may be cast by write-in ballot for such candidate by writing in the last name of the candidate for President and the last name of the candidate for Vice President or only the last name of the candidate for President; such write-in ballot shall be counted, and shall be in all respects effective, as a vote for each of the presidential electors representing such candidates for President and Vice President. No person nominated for the office of President, Vice President, or presidential elector by a major or minor party or by nominating petition shall register as a write-in candidate for such office under the provisions of this section and any such registration of a write-in candidacy filed by such a person shall be void.

Subsec. (a):

Electors placed on ballot by Secretary of the State must be those pledged to vote for the candidates nominated by their national political party. 254 C. 789.