This is a mounting frame for a micro USB jack, purchased off Amazon:

https://www.amazon.com/gp/product/B0183KF7TM/ref=ppx_yo_dt_b_asin_title_o01_s00?ie=UTF8&psc=1

Once you have finished soldering the end solder points to your satisfaction, glue the jack into the larger frame, then the smaller part on top to help hold it in place. The holes are 17.5mm center to center, and the middle opening needs to be 10mm wide by 5mm high.

For panel mount the side holes need a M3x25mm bolt and nut.

Creality

Ender 3 Pro

No

No

0.2

100%