I found the object accidentally on my own, lol, it was something the detective said about looking inside, so when I found it I thought "Ooo, I can use this!".
The inside is almost as confusing; I thought I almost had the third side done then reset it. *Goes back to bash my head against the box to see if that opens it*.
Edit: Red left to do. That's the hardest one for me.
Yay, I got it!