What the shroud and lock mean on site
The 1-1318300-3: The friction lock holds the pair mated without a secondary latch — if the harness sees repeated tugging, the lock may wear; a dab of thread-locker on the lock tab is a common field fix. Through-hole solder termination means the header can be reworked on site with a standard iron — no special tooling needed to swap a damaged header on a board.
