Look at your carb the brown plug you have on the bowl vent goes on the valve cover vent. the larger one on the valve cover vent goes to the back of the air cleaner. the vent line plugged with a blue cap also goes on the valve cover vent. what else is your concern? That would depend on the parts you have.
I had a 318 -2bbl Challenger years ago. It seems like the one brown rubber cap goes to the black breather cap on the valve cover and the other brown cap goes to PCV valve. The one black cap on back of carb goes to choke diaphragm and the other goes to distributor vacuum advance. One vacuum port goes to air cleaner. That's all I remember now. Sorry. Hopefully, someone has a good photo of what you need.
Terry W.