You don't have to hook any vacuum lines up to get the secondaries to work. [img]images/graemlins/crazy.gif[/img]
What makes you think they're disconnected?
They won't operate without a load on the engine, if you're trying to get them to open while parked.
The only way to
disconnect them, is to pull off the "c" clip at the base of the carb.
Check on the passenger side, aft of the choke.
You'll see a housing with 4 screws, triangular shaped in profile, with a rod coming out the bottom of it.
That rod attaches with the aforementioned "c" clip to the secondary throttle plates.
You may just have a leak in the diaphragm itself.
Not hard to replace, but IIRC, you'll need to pull off the choke to get the secondary vacuum diaphragm housing off.
is what you should be looking for. (albeit, not a chrome one. [img]images/graemlins/wink.gif[/img])
another shot of one with the "quick-change" conversion. (to change the secondary spring for different applications/performance)
At least you can now see the general area to check. [img]images/graemlins/grin.gif[/img]