For the purpose of such election the commissioners of election for each old county proposed to be cut shall appoint three managers for each voting place in the area of the old county proposed to be cut off, not more than two of whom shall be in favor of the proposed new county or against it, and shall deliver to them the books of registration for those voting places which the registration officers shall turn over to the commissioners on demand. Such election shall be conducted in the same manner as general elections in this State and all persons entitled to vote under the Constitution and laws of this State at general elections shall be entitled to vote at such election.