- 2 x switching (normalling) stereo jack and switching ground contact, horizontal PCB mount, https://www.neutrik.com/en/product/nc4fbh B Series, 3 pole male XLR receptacle, grounding: mating connector shell and front panel: mini toggle: 4mm above panel, tight but possible micro toggle: probably too short without extra spacers, use mini toggle pushbuttons: ample space above pcb micro toggle: 0mm above panel; could work with printed spacers mini toggle: 4mm above panel, tight but possible mini toggle: 2.5mm above panel, ample thunkicons: probably too short without extra spacers, use mini toggle pushbuttons: ample space above 11.75mm (existing 1p12t rotaries, use 11.25mm holes to PCB edge 8.2mm, see https://disti-assets.s3.amazonaws.com/tonar/files/datasheets/16730.pdf 25-pin D-Sub connector.