Well there, if you've dig into the directory addons/amxmodx/configs/orpheu/functions you will find some files those files have some data written in them, to be more specific the data is written in JSON format, you will find inside each file there're identifiers for each special function, now the value of the identifier is usable depending on the operating system if you're using windows the value is mostly a sequence of bytes and for linux OS are usually strings, now those values helps the module(orpheu) to locate or obtain the memory address within that function so that the function can be hooked or executed,