Tower of Treachery - How to unlock the ammo chest room

There are two methods to unlock the ammo chest room, both indicated by the paper in the telescope room
"3+4+2+1" and "10💀?"

There is a hidden room in the lever area near the lever number 2


Need to pull the levers in a specific order and then pull the hidden lever here to unlock various things Here are the 3 codes community found so far:

• 3421
  Unlocks the ammo chest room in the final event
• 5123
  
  Spawn a bunch of resources on the table
• 1532
  
  Unlocks the hidden path/alternative path for the Okri challenge"Return Visit"

• 4361
  According to Rosy, code 4361 will spawn a rat orge

SPECIAL NOTE: once you active 1532 or 5123, the levers will be rested, meaning you could active another code. That being said, 3421 will permanently locks all the levers, meaning no code can be activated after 3421, so if you want to active multiple codes, enter 3421 as the last one.

"10💀" represents the 10 skulls you need to find to unlock the Okri challenge

"? "represents the unexpected aid statue near the big tree

The second method to unlock the ammo chest room in the final event is to collect all 10 skulls and trigger the unexpected aid statue.

Go to the hidden cave on the right side when you first enter Lustria

trigger the statue
I don't have time to record a video myself, but here is a video from the Chinese video platform bilibili
Tower of Treachery/10 skulls/3 tomes/2 grims/4 lair ahead[www.bilibili.com]
Another steam guide that shows location for all ten skulls https://steamcommunity.com/sharedfiles/filedetails/?id=2953925050

Big thanks to wolfwood444 vel Bazi for posting codes that he found to the steam forum