I want to use outside mastering gear on the stereo bus and when needed on the surround busses.  I search for the routing  but couldn't find or make the connection on the stereo bus. My question.  Is there a special way to make the routing to the stereo bus that I forgot to search for? How can I use the outside gear on the surround busses?  
Thank you for your answers.
Tejo
				
			Thank you for your answers.
Tejo
 
	 
	 
 
		
 
 
		 
 
		 
 
		