Audio Jack, 2 x switching (normalling) stereo jack (T/R/S), https://www.neutrik.com/en/product/nj3fd-v 6.35mm (1/4 in) Vertical Jack, 3 x switching (normalling) stereo jack and switching ground contact, vertical PCB mount, https://www.neutrik.com/en/product/nc3mah A Series, 3 pole female XLR receptacle, grounding: separate ground contact to mating connector shell to pin1 and front panel, vertical PCB mount, asymmetric push, https://www.neutrik.com/en/product/nc3fbv2-da B Series, 3 pole female XLR receptacle, grounding: mating connector shell and front panel, steel retention lug, vertical PCB mount, black chrome shell, https://www.neutrik.com/en/product/nc3fbh1-b B Series, 3 pole.