The thing from the Bayou wrote:
^ Some might assume they lost their saucers in an earlier battle.
As CGI was becoming more widespread, it would not have been terribly difficult to show one of the ships conducting a saucer-separation. Alternatively, Sisko or Martok could have given an order such as, "Have USS Venture
conduct saucer-separation as planned," with the drive section later appearing on its own.