NOw that i think about it... is the compressor you got a general use compressor with a holding tank or an airbrushing only compressor?
If it's only for airbrushing you should take shermanfreak's advice and just buy an adaptor. The main advantage of quick (dis)connect couplers is that if you need to use the compressor for other uses, (filling up a tire, operating a nail gun) you can easily switch between tools (given they have the right couplers attached)
but if your compressor is meant strictly for airbrushing, you don't need the couplers just buy an adaptor.