Ban Pa is a coastal town you can explore in Gray Zone Warfare, but it's overrun with NPC enemies who will try to thwart you as you attempt to complete tasks like Lamang Connection.

Lamang Connection is a task that you get from Banshee, one of the later game vendors or task distributors that you will encounter in Gray Zone Warfare. There are several tasks that you need to complete first in order to unlock this task, and the task itself is not the only thing that you need to unlock. You will need to explore the city and find some evidence that is locked behind a locked door.

To find the evidence needed to turn in Lamang Connection, you must reach a locked fishing hut on the northern side of Ban Pa, just north of the Elder's House landmark, at map coordinates (205, 137), and unlock it with the Ban Pa Fishing Hut Key. This key is also known by the abbreviation BP Hut Key.

The Ban Pa Fishing Hut Key can be dropped by enemy NPCs in Ban Pa. If you land at the India 1 landing zone and make your way south through the town and to the locked house, you'll find plenty of AI enemies that can give you the key. There's also the India 2 landing zone to the west.