Two of the inspectors, one from each of the 2 political parties, shall be designated by the moderator at the opening of the polls to act as ballot clerks. They shall have charge of the ballots and shall furnish them to the voters. They shall be given a duplicate copy of the checklist by the town or ward clerk. The other inspectors shall be assigned such duties in the polling place as the moderator may determine including, but not limited to, the relief of the ballot clerks and the assistance of voters marking their ballots as provided in N.H. Rev. Stat. § 659:20.