i regret to inform you that you wasted your money on a pretty good solderless adapter. the regular old V2 won't work with those things, only the "special edition" one with the red PCB.
that said, it isn't TERRIBLY difficult to do a solder install if you're patient and careful. if not, you might want to visit a local installer...
anyway, if you still want to know how to use the USA:
open your Xbox up, etc.
take those really tiny little metal things(rivets) that came in the USA bag and put them into the LPC holes, starting from the side closest to the front panel. remove the screw holding the motherboard down close to the LPC...now place the d0 wire into the appropriate hole(see pictures which can be foudn everywhere) and make sure it stays there. carefully line the USA up so each pin sits over the corresponding LPC hole(which now has a rivet in it) and push it down. use the provided longer philips screw to secure it to the motherboard.
put your chip on.