How to change charging logic board

If I were to take a literal reading of your question, that you are trying to figure out how to repair your charging port assembly, that might be somewhat of a challenge that I'm not sure would be worth your time. If you're looking for instructions on how to replace it, which would be my advice, then I've got just what you need. iFixit doesn't have a guide for your phone, but the Spanish site Nadie Me Llama Gallina does.

Manuals / Motorola Edge 30 / Auxiliary Card - Nobody Calls Me Chicken

The site is in Spanish, but if you use it with something like the Chrome browser that has built-in translation capabilities, then it becomes quite usable no matter what your native language is. Their guides are well written, complete and very helpful.

Good luck and let us know how it turns out for you.