Use a sharp object to lightly scrape (don't scrape the pad off) the copper pads to be soldered to, they should turn silver in color. Then with your soldering iron touch part of the pad and at the same time touch solder on to the pad (not on the soldering iron tip), the solder should flow into the pad (don't put too much). Now that you have solder on the pad, touch the soldering iron on the solder while dabbing the wire into the soft hot solder. This should give you a good bond.
PS2 v5 NTSC U/C SCPH-30001R GH-015 w/Matrix Infinity