Replace Power Supply

So i picked up this power supply and found that it did not fit my stupid dell box so i ended up doing the following.

The problem was i got one with 2 connectors not one. but even then it would not of fitted.

So just hold it up to space where to put it and see what needs to be cut out.

Cut cut cut...

and keep on measuring up and cutting and finally we get a hole that is as follows.


and as a suggestion from TheScientist and a very good suggestion should take a file to edges so do not get cut.