N.H. Rev. Stat. Ann. § 666:5-a

Notwithstanding any other provision of law to the contrary, a challenger appointed pursuant to RSA 666:5 shall be assigned by the moderator or other election official presiding at the polling place to such position or positions within the polling place as will enable such challenger to see and hear the hand-counting of ballots for the tabulation of votes, and to maintain a line of sight on any electronic ballot counting device. Nothing in this section shall deprive any other person of the right to observe the hand-counting of ballots for the tabulation of votes as provided by law.