1971 honda cl175 twins

[alpat]

Need help.  I have had both carburetors off my bike for approx. 10 years.  I  am finally trying to put them back.
i got everything back except for the spigot on each carb that points to the rear of the bike,  It looks like a vacuum spigot, but I don't know where the tube would connect to.  Any advice would be appreciated.

[L.A.B.]

Where are these spigots on the carbs exactly?

If they are right at the bottom of the carbs on the float bowls then they are probably the spigots for the float bowl drain tubes.
Is there a slotted head drain screw next to each spigot?

[hmmmnz]

[alpat]

Thanks for the reply and the schematic.  I think you are right.  The spigots on my carburetors appear to be on the same boss that has that screw that you mentioned but the spiots don't point down, they point towards the rear of the bike.  I am now convinced that they are there to drain the float bowl.  I guess I should just connect hose to them and point the hose downward or maybe just leave the spigots as they are and connect hoses to them in the event I need to drain the bowl.  Thanks again for your input.