16 circuits at 3.00 mm pitch — dual-row right-angle header
The 4-794678-6: It is a board-to-cable/wire style connector, meaning it mates with a receptacle on the wire side, not another board.
Locking ramp and board lock for vibration environments
The fastening type is a locking ramp — an audible latch that holds the mated receptacle in place against vibration and cable pull.
