Thank bangnoise too!
Your assumption looks correct. Make a [jit.gl.syphonserver maxi-path @servername Maxi] and connect the output of the [jit.gl.slab maxi-patch] to the new jit.gl.syphonserver, and you should, when running the patch, see a Syphon Server listed in any Syphon Client called “Maxi”
That should be it.