What the 3.96mm Pitch and Latch Lock Mean for Your Harness
Compared to finer-pitch connectors (2.50mm, 2.00mm), the 3.96mm spacing gives more room between contacts for wire dressing and terminal insertion, which matters when you're using 18-22 AWG stranded wire in a harness build. That latch is the primary retention mechanism; it resists pull-out from cable strain better than a friction-only fit, though it's not a secondary lock like a TPA (terminal position assurance) found on automotive-grade connectors. For field service, the latch releases with a squeeze, so the connector can be unmated without tools.
This housing ships without contacts. Source the matching Economy Power female crimp terminals separately.