With the bush fitted, the bung sorted, and the elastic threaded through the pole (see parts 1-3), it's time to fit the connector. There are a few types around, but for anyone new to pole-fishing I'd recommend using the stonfo type connectors. The hardest bit is to get the elastic ‘just right’, so that the connector slowly slides back into the pole. It’s all too easy to set it so that it ‘snaps’ back too hard (in which case you may bump off small fish) or hangs out the end (in which case line will tangle around it when fishing). One of the keys is to fully stretch the elastic that will be in the pole before you actually attach the connector (step 1). If you don't, after hook your first big fish (or snag!) you'll suddenly find the connector hanging out the end, which isn't just a pain, it's also embarrassing!
Gareth Purnell, Improve Your Coarse Fishing

1.
Stretch the elastic to ensure the bung is set correctly inside the section.

2.
If using a standard bung, now’s the time to snip off the tag end.

3.
With the elastic slack, snip off about five inches above the bush.

4.
Thread on the stonfo’s collar...

5.
...and then the connector itself.

6.
Stretch the elastic about three inches and slide the connector to the tip.

7.
The stonfo should be tied on under a tight elastic.

8.
A single overhand loop is all you need. Keeping everything tight...

9.
Trap the loop onto the body of the connector and push off with nail.

10.
The knot must be tight to the bottom of the connector like this.

11.

12.
Now push the collar up, lock in place, and trim the loose end.

13.
In theory the stonfo should gently slide, not snap, back to the tip.