For your own boards, there are connectors like this[1], based on pogo pins. [1]: https://www.macrofab.com/blog/designing-pogo-pin-programming-cables-intro-tag-

For your own boards, there are connectors like this[1], based on pogo pins. [1]: https://www.macrofab.com/blog/designing-pogo-pin-programming-cables-intro-tag-connect/ https://www.macrofab.com/blog/designing-pogo-pin-programming...