Search for "Through-Hole Soldering" on this How To Solder guide to ensure you replace and solder the charging port correctly.

If you are just improving the connection and not replacing the component, skip this step.

Pull the wires on the four sides of the replacement charging port through the holes in the circuit where the charging port was previously.

Solder its joints in the back. Be sure that the soldering joints creates a concave tent shape indicating a strong connection.