i dont know how that specific guitar was wired but it wouldnt be difficult to draw up a wiring diagram. But if that guitar has any collector value and is unmodified or you arent confident in your soldering skills you should not rewire it. Assuming it is a master tone and master volume it would go a little something like this.
---- = wire
/ = variation of switch
> or ^ = connections
o = spacing to put bottom line in right place
ground -> pickup 1 -> pickup 2 -> volume/tone controls -> output
when the /'s are connected it short circuits the pick up, with both connected no sound with neither connected both on. If your switch is a les paul type you are going to have to think of another way because the middle setting will short circuit both.
edit: excuse the crude "diagram" i couldnt be bothered drawing one up properly.