find the assembly notes - C1: enlarge footprint; a box film cap instead of latch, https://www.neutrik.com/en/product/nc3fav2-0 A Series, 3 pole male XLR receptacle, grounding: without ground/shell contact, vertical PCB mount, retention spring, https://www.neutrik.com/en/product/ncj6fi-v Combo I series, 3 pole XLR female receptacle with 6.35mm (1/4in) stereo jack, vertical PCB mount, asymmetric push, https://www.neutrik.com/en/product/ncj6fa-h-da Combo A series, 3 pole female XLR receptacle, grounding: mating connector shell and front panel, horizontal PCB mount, https://www.neutrik.com/en/product/nc3mbh B Series, 3 pole female XLR receptacle, grounding.