This is, basically, to get NI Maschine’s internal sequencer to control other instruments using it’s midi out.
Simple to do in Live/Logic/Cubase etc, but I’ve no clue how to in Renoise.
How would you route the midi out from plug in into the midi in of another? Can you, even?
You would really need solutions like Energy XT to do this (A VST plugin that allows you to load multiple plugins that you mongst others can MIDI link to eachother.)