choke heater tube

where on the carb do the 2 steel tubes go to from the choke heater tube, the isnt any near the choke, there is one on the back where the distributor advance goes to and the other vacuum ports are on the front, sorry cant find anythin in my manual but any help would be great

wait i was reading in a previous thread i posted that only 4MC carbs used this, mine must not be a 4MC ,so do i just make a plate to block it off?