That is not the hard part. There are 3 solder points.
The hard part is disassembling the case. They are all different and they are all a royal biatch!!!!!! Usually the thing must be almost entirely dissassembled to get the bottom cover off.
Not sure what you mean. Why is there solder if it isn't connected to the board? If you really need to unsolder the wires, go to Radio Shack, ask for "solder wick". Use that with a soldering iron to remove the solder. Then use needle nose pliers to wiggle the wires from the bottom of the board until they're free.I am able to get the part out of the case. Luckily it is not part of the system board directly but instead connected by wires. It simply screws out. I am not sure what to do to remove to solder.
When desoldering, make sure to apply the heat only as long as necessary. Things melt and fry out quite easily if you hold it there too long. Using a heatsink clamp is a good idea if there's room. Same goes for soldering too.
As I was reading the last few posts it dawned on me. The circuit board has plated thru holes. This means that the copper plating goes all the way from the top to the bottom of the board thru the hole. The only effective way to remove the solder is with a solder removing pump. You will need to resolder before you try to suck it off with the pump. Good luck.
I think the last time I did one of these what I ended up doing is applying pressure to the pins (from the bottom) with the soldering iron. As the solder would melt, the connector would lift from the pressure.