[LAU] Jack command line connect

In my attempt to stop the flipping xruns I get even from a really simple jack/fluidsynth (with 6.5mb soundfont) setup, I'm going to see if I can get it to run without xruns at all- so I'm going to stop the X server (which takes up quite a lot of cpu and memory). Before I can do this, I need to work out how on earth to connect fluidsynth to alsa_pcm without qjackctl. Why are there no man pages or --help or anything for jack_connect, etc? I've tried the obvious: "jack_connect fluidsynth alsa_pcm", but that doesn't work and without any usage information whatsoever I'm completely stuffed. Also, a command line list of port names that can be connected would be nice. Thanks Simon