iv done this with my pc box
u cut the plug off ur power strip
strip the wires
u open up ur power box in ur pc and u basicly connect the wires coming from the adapter for your input to the matching colours
chances are ull see a black and red wire in your pc case and your power strip mite be brown and blue if this is the case its black to brown and blue to red
hope this helps
if your still struggling with it ill try sort out a pic of my wireing soon as possible
it mite sound complicated but its very very simple
all u need to make sure is u use proper wire connecters because you dont wanna set your house on fire haha