Article II
Section 1
Each State shall appoint, in such Manner as the Legislature thereof may direct, a Number of Electors, equal to the whole Number of Senators and Representatives to which the State may be entitled in the Congress: but no Senator or Representative, or Person holding an Office of Trust or Profit under the United States, shall be appointed an Elector.
Nowhere in that does it say the Governor of a state has a say in how the elcctors are selected.
I hope you are correct but I just read something about a federal law that purportedly was related to this that involves the governor.