Personnaly i use some Mx-6 from Artic, really good quality/price, never have to complain.

Bonjour, le tuto pour remplaçais tout l'écran ce trouve juste là : https://fr.ifixit.com/Tutoriel/Remplacem...

Hi, this cable connects the Wi-Fi module of the console to its antenna and it is called "Wi-Fi antenna", because the other part of the cable is soldered directly to the antenna

almost a decade after I answer. but you never know you were still looking for it (I don’t believe). but you can find some on aliexpress, for the rubber the quality and the same but the buttons slightly less pleasant, unfortunately not pack only for the button power but for ~10 € you can have the pack of rubber and that of button, which is always expensive than buying a new 3ds xl for parts

Before buying a new connector, i'm worried about your motherboard because if you have ripped out the entire connector of it, there is a very high chance that you had ripped out some soldering pads with it, making repair the console much more complicated.

Probably a loose connection with one of the ribbon cables. unplug and replug, all ribbon cables you have unplug by doing this tutorial and check if you have well reconnect all