@L29Ah Required a few tries in my case. Probably needs at least a 60W soldering iron and enough patience to get the solder melted and the pins wetted if you want to keep it on the safe side. On the other hand it can be done with a jet lighter, some solder, flux, aluminum foil and a steady hand if you have some experience with such a method of soldering. I suggest you consult the thinkpads forum or thinkpads IRC channel on libera.chat (don't quite recall the name), as i don't really remember the caveats.
@Evv1L