Wish I had Identified the Hose

Type 4 2.o Litre, there are 2 small hoses on the rh side one goes to the preheat thingy, the other goes where? There was a picture put up on here that identified all the hoses, anyone know where it is?

Cheers

 

To the pipe between the carbs under the air filter - you might be able to see the spur, you'll have to remove the air filter to fit it.

 

Of course, yes, I remember now, what a numpty I am thanks Zed that's been bugging me all day...