This is a remix of a superb mounting for 40x40mm fans in an Amiga 600 and Amiga 1200 case. The hole for the fan-cable in the original print was only for blowing outside the case - not inside. So I put holes in all 4 corners for the cable - so the user can decide either he/she will blow fresh/hot air inside or outside the case.
Note: You can fix the fan mount like the original - either by using double-sided-tape or by using some glue(gun).