Vote centers necessitate the use of internet-connected, electronic pollbooks. All of the poll book providers have suites of centralized, all-inclusive software that do everything in the election and voter registration process (even campaign finance reporting!) except shove paper ballots through a scanner. They can even process the tabulator electronic files and geolocate voters.
So depending on how a county sets up their vote centers - they can potentially expose the entire election to the internet and provide ways that ‘results’ can be overwritten. This is happening in NM: