In the command tower, the power center.

3 seconds sound clip from the The Black Hole (1979) movie soundboard.

You can hear this line at 00:59:17.437 in the Blu-ray version of the movie.

Quote context

[...]

- They turned to him when Doctor Reinhardt ignored the orders to return home.

- He tried to take control of the Cygnus.

- Reinhardt called it mutiny and killed Mister McCrae.

- What became of the crew?

- They were captured by the sentry robots and are still on board.

- What? Where?

- In the command tower, the power center.

- Robots. Humanoid robots.

- The most valuable thing in the universe, intelligent life, means nothing to Doctor Reinhardt.

- Without their wills, the crew became things he could command.

- That explains the funeral.

- Right.

- And the limping robot you spotted.

[...]