I'll try to recall this part.
You hear an alien voice. It should be understandable (a bit) now that you finished the pipes puzzle outside.
You press the button - I think it's a single red button.
The alien voice will now test you to check if you can understand it.
It will say a number.
You then press one of the 4 buttons at the bottom of that panel.
The buttons are from left to right 1 2 3 4.
So if it says two - press the second from the left button and so on...
Once you pass that test, you can then use the control panel.
