Some info and instructions.
Your case manual. > http://www.coolermas...Download&id=753 NB. a system speaker is included.
Not shown on the G2G Tutorial, or on the case instruction is the I/O shield. On your old case, at the back, top left hand corner where the Mobo sockets poke out the case, that is the I/O shield.
This must be carefully removed (try not to damage, watch you do not cut your finger, some very sharp edges) and installed in your new case.
It pushes into the case from the outside. Stat at the top edge and work down.
Insert into the new case from the inside, make sure it is the correct way up. it will click into place.
More to follow.
Do you have a promised delivery date yet?