I think the syntax is MidiNote MidiChannel Note.velocity
So in your case it would be MidiNote 7 0.5 to to whichever virtual port you are sending to and then draw a line from the router virtual port to APC MINI MK2 1 port.
5 is velocity for red.
Steve Caldwell
Bome Customer Care
Also available for paid consulting services: bome@sniz.biz