Whats a technique that I am not aware of to pull an AC cable through a conduit that is just a little to small
Don't push the wire, pull it.

I assume that you can at least get a small, but reasonably strong string through the gooseneck.

Strip the wire, double it back on itself and twist it to make a small loop. Use a nail as a form to keep the loop open, and also get a good, tight twist.

________          _
________SSSSSSSS((_)) &lt;---- tie string here


Tie the string through the loop. Then you can flatten the loop so it'll fit through the gooseneck.

Use the string to pull the wire through the gooseneck.

Cut off the twisted part and make your connections.



Alternative approach:


Push a single wire through the gooseneck.
Solder the single wire to both wires of the cable.
Pull the cable through the gooseneck.
Cut off the soldered joint and make your connections.