just a small note:
i am by no means telling you to do this.
this may damage your pc.
invalidate your warranty.
may curs injury to yourself.
wear all protective equipment.
be trained and competent with all tools used.
i am not responsible for any of the above happening to you or anyone else.
start by drilling a hole through the case just big enough for the screw end of the pigtail lead to go into.