You can't do it.
My charging port busted on my Triumph, I found two places nearby that specialized in circuit board repair, they looked at it and said it wasn't worth the effort. apparently there is heat resistant glue on top of the solder connection, which inhibit the ability to desolder the old port. Both repair places said that due to proximity of other components it would almost certainly destroy the phone to try and get that glue off, and even if they did, and soldered a new port on, it wouldn't be on very well, and would probably break after a few insertions of the USB port.
Both had the phone for a couple days a piece and after disassembling and examining the phone and the port, both said it couldn't be fixed reliably and gave me the phone back. And these were places that do this for a living, and have the equipment to do it right. If they can;t do it, chances are we couldn't.