Reply to Connecting Midi Fighter to a Mixer

I'm a young DJ from Melbourne, Australia and am interested in digital djing. I want to use midifighters and I also play in clubs (always with the cdj's). I was wondering how to connect the midifighters to the clubs mixer - and in turn, the mixer to my laptop (Macbook) with traktor pro. I know it probably has some simple answer, but any help is much appreciated.