Back door, huh? Good idea.
2 seconds sound clip from the Star Wars: Episode VI - Return of the Jedi movie soundboard.
You can hear this line at 01:28:00.999 in the Blu-ray version of the movie.
Quote context
[...]
- Admiral, we're in position. All fighters accounted for.
- All groups assume attack coordinates.
- All craft, prepare to jump into hyperspace on my mark.
- It's only a few guards. This shouldn't be too much trouble.
- It only takes one to sound the alarm.
- Then we'll do it real quiet like.
[...]