AFAIK there is no industry standard connectors for the 'music market', in industry terms it's a niche market, unworthy of a dedicated connector, it's just a question of using what's available and what will do the job. I'm sure there are speciality products in the audio signal range, but TBH the electrical range that we're using is comparatively small and insignificant that basicaly anything will do! π
All IMHO π
Edit; Yes I use connectors made for PCB soldering, with screw terminals for the pickup wires and bridge earth.