Here is a video, with English subtitles, of Maeda Atsuko’s surprise appearance after Takahashi Minami’s election speech.

After the conclusion of Takamina’s election speech (having taken the #4 position), Maeda Atsuko appears from offstage for a surprise appearance. What follows is relatively short, but very heartfelt exchange, where Acchan thanks Takamina for her tireless efforts as the the 48 group’s General Manager.

Source: http://www.asahi.com/special/timeline/20150606-akb/

Source: http://www.tokyo-sports.co.jp/entame/entertainment/408403/