Wis. Stat. § 5.87

If a central counting location is not utilized, the procedure for tabulating the votes by the automatic tabulating equipment shall be under the direction of the chief inspector and shall conform to the requirements of the automatic tabulating equipment. If any ballot is not accepted by the automatic tabulating equipment, the election officials shall make a duplicate ballot to replace that ballot in the manner prescribed in s. 5.85 (3) . All proceedings at the polling place and at any central counting location shall be open to the public, but no person, except those employed and authorized for the purpose, may touch any ballot, container, envelope, return or equipment.