Have you ever soldered? If not it’s something that takes time to learn the skill properly. You may want to just look into have a modder in your area do the job instead of risking messing up your stick permanently. To each is own but I say better to be safe than sorry. I’ve been soldering things since PS1 modchip days before there were videos online to show you how to do it. If you do decide to do it yourself, don’t make the stick project the first thing you solder. Solder wires together and stuff like that first to get an idea of how the iron works, etc. Good luck!
I definitely appreciate the concern, but I do have soldering experience. When I was saying “having never done it before” I was referring to soldering to a stick PCB. My concern is which points on the PCB to solder to, which is why I was asking for a guide or video.