bo3 soe egg help needed!

So ive been playing bo3z for a while but just found out recently that there is a really cool easter egg on the map shadows of evil since i would only play kino der toten and hated soe cuz id always die because of there being "no pack a punch" well turns out there is and i was kust stupid so i know how to do all the sacrifices and get the gate worms to open the pack a punch and i know that u have to look for 3 symbols around the map to unlock the wall infront of the eggs which lets u get the sword or whatever but from there on out i dont know how to complete the rest or the ee and ive seen people say that u need a full lobby of 4 people yo be able to complete the ee but i have nobody to play with and im on ps so id really love it if someone with alot of patience could guide me through it and help me out w it (im not bad at zombies but idk how to do the easter egg so i just play normally with no clue on how to do any easter eggs on any maps)

im not sure if this post will get me banned for asking people for help cuz i dont spend that much time on reddit so excuse me if i have broken any rules that i didnt know of