To rewire is easy
You just need to use a small knife to lift small tabs(on the plastic) and pull the wires out. once that is done, you can place them back in to work with the new board.
The most easy way is to follow the wires to the front of the case to see what connects to what. Then with the gigabyte book, you can get the new pinout.
Something like this(but not always the same).