Hey, I guess you remember me LUL
So, turns out the 4 sites are an Arma III easter egg.
If you draw lines between each of them, they cross straight on that sinkhole, which is where the Contact DLC starts (with the root coming out of the floor and such).
About the message tho, I'm still not sure, but here's what I think it references to:
"Wherefore, they have foresworn themselves, and, by their oaths, they have brought upon themselves death; and a hell I have prepared for them, if they repent not;"
The introduction at the top of the page also mentions Enoch, which is the name of the Livonia map in the files:
"Adam’s seed keep a book of remembrance—His righteous posterity preach repentance—God reveals Himself to Enoch—Enoch preaches the gospel—The plan of salvation was revealed to Adam—He received baptism and the priesthood."