Up to his old tricks
Don't ask how Nascour got ahold of Wes's phone number. That's unimportant. What is important is that he's called the boy out today in one of the lesser-visited areas of the island, away from prying eyes, claiming that he has something very important to tell him that can't properly be communicated over the phone. So here he stands in the middle of the woods, arms crossed and waiting for his former enemy to show up.