Help needed on my Sportster's vacuum lines

[AutomaticFeed19]

Need help figuring out the vacuum lines on my Sportster. So you know there's one that goes to the carb, but where does the other end connect? I got the factory line on the right side and trying to get the routing sorted. Got tips or diagrams? Thanks!

 

[Tamco.ty]

Usually that vacuum line from the carb connects to the vacuum advance on the ignition or to a vacuum operated petcock, depending on your model year, if you have the factory lines, they often run along the frame tubes, try tracing from the carb back toward the intake manifold area or near the fuel valve
I'd recommend checking the service manual for a wiring and vacuum routing diagram..it's a lifesaver

 

[TL.2003.XLH]

Manual would be good.

I just worked on mine. From carburetor, there is a Y, to vacuum petcock and ignition advance controller. Both are within 6" of the carb. Tamco.ty called it.