Solex 34 pict3 carb vacuum fittings?

[BRAD]

I fitted a refurbed Solex 34 pict3 carb today from machine7, it's great but I seem to of picked up a extra vacuum pipe at the front? where does it go to or do I just block it off, you can hear it sucking when it's running, but still runs ok, revs drop when up block it off.
Side one I connected to dizzy as per the one I replaced.
Any one know?

Cheers

 

[Happystamps]

Side one gets connected to dizzy, use either the front one or the one on the inlet manifold if it's the right size for the thermostat on your original air filter if you have one. Block all others off, and tune the carburettor properly with a CO meter.

 

[BRAD]

Thanks HS, I've the oe oil bath filter but no thermostat so will just block it off I think, thanks