cargo button puzzle?

[artmangm]

so landed on footfall and found a crate with 4 switchs on it labelled 1 3 4 5 and wondering how do i solve this?

[Jivebot]

3-5-4-1

Dont recall what the loot inside was. Nothing too impressive I don't think.

But hey, loot is loot.

[stax]

There is a letter in the dock area you find on a dead body. It gives clues to the combination lock. It starts with "The book near the altar". The book is called something "chapter three" so 3 is the first number. And so on.