Need help @ mixture machine

[Schwarze Pest]

Yep, then i turn to the right and block the two holes, then i read the report from the Doctor (or something other) in the small room with the fuse boxes. I putting on the switch in the room (with the numbers and so on...), too. But then i go to the left side i die. I found the artifact in the dog box, too.

You have to stay in the light at the left corridor or you will get killed. The lights turned on when you pull that switch at the other corridor (where you blocked the two holes with the boxes).