This Fortbyte is hidden in the most western point of the island. Go there and use your Skull Trooper emoji to unlock it.
Players must equip the Skull Trooper emoji during a match and use it to unlock Fortbyte # 03. You can obtain the Skool Trooper Emoji by qualifying your Battle Pass to Level 58.
The westernmost point of the map is inside Snobby Shores!
A few steps to the west of the houses there is a cliff with the mark of the west point. Go there to get the Fortbyte!
The Fortbyte appears before the address marker. Use your Skull Trooper emoji to get it.