I am using the Powertank hose on mine with a quick disconnect.
This way the hose works with both the ARB compressor, and my Powertank.
You should be able to go to a hardware store and get one.
It just screws into the front of the compressor outlet.
If you add a tank later, you get the hose from the tank to the compressor.
I bought mine direct from ARB since they are local to me.
You then just out that brass QD into your tank, then the line into the QD.
I added the tank not long after my installation.
The compressor will probably be happier though if you can mount it elsewhere besides the engine bay.