I must be very stupid, I am going insane and I can not for the life of me find out where or how to input the code. I'm not asking for the exact location, I just need a hint as to which general area it's in, like whether or not its on the surface, in the caverns or in a menu somewhere
edit: omfg, found it. Well played. I put a hint at the bottom of the comment.
Second hint for those who need it: You're probably thinking of the wrong kind of Input.