I remember the room you're talking about. As I recall there is just a lever or control near by. I don't recall exactly where but it was not particularly tricky to find.
I recommend you just look around in that area for anything that looks like a control. Maybe use a touch. And use the cursor to see if anything can be activated. But like I say, I'm pretty sure it's pretty much a normal control
It's been a while since I've been down there but if I recall correctly I don't think that can be opened at that time. I know I couldn't get in there after trying everything. I'm not 100% sure on this so only take it for what it's worth.
I'm pretty sure I got into that room. I'm almost certain of it, and that it was just a matter of finding the level or switch or something nearby.