Hey Munliath, thank you for playing!
SPOILER ALERT:
Yea, the glass panels turned out to be a little confusing for everyone, you are not alone with this :P The color of the panel and the color of the room should give a hint as to where the panels belong. You'll need to make use of Q and R at some point to correctly place them though. This will make more sense after you found the code with the symbols. The hint for the code is in the same room, you might wanna look for it in the dark though ;)
Let me know if you need more help!