After the polls close on election day, the precinct board of election inspectors shall place the ballots in the ballot container provided for ballots under section 669. The board of election inspectors shall securely fasten and seal the ballot container with an approved seal furnished with the election supplies. The seal must be affixed to render it impossible to open the ballot container without breaking the seal. The board of election inspectors shall then deliver the ballot container to the township or city clerk.