Labels Milestones
Back, circular holeshttps://www.cui.com/product/resource/sj1-353xng.pdf TRS audio jack stereo horizontal waterproof 6.35mm (1/4 in) Vertical Jack, 3 x 3 mm, 0.5 mm pitch, 20 mm row spacing, 25x22.2x16mm https://www.we-online.com/catalog/datasheet/760871131.pdf 3D.