Can anyone run me through how to use the instances for Wheatley's video screens?

I get that I need the screen itself and the studio, which give me a monitor and camera. In fact, I'm pretty sure I've got the whole thing down, but when I run my map, there's a box around Wheatley's screen. If I NOCLIP over and look up underneath it, everything is running fine in there ...

I have a feeling there's something I need to feed into the instance, but I can't find any clues on the instance itself!

Anyone want to help me out with this?

You know you don't have to use the instances, make your own
developer.valvesoftware.com/wiki/Screen_(Portal_2)

you have to trigger the screen and make the monitor pop out. First you have to name the instance, Lets say "wheatley" then you trigger it from something. and in the output have it say target:wheatley / target input: instance:relay_deploy_(whichever way you want to deploy it, there are a few options);Trigger. Then do the same thing for enabling the screen.

Ah, thought there might be something like that. Thanks!