You will create a hole like this. Remove any flashing and..

fix the disc on the end of the short bottle you made earlier.

Then make a hole in the side of the bottle and...

...and attach the funnel which you made earlier.

The funnel and bottle should fit snugly but be detachable....

You need a metal or wire ring like this.

Attach the ring to the netting funnel inside the Epsilon.

Attach a length of soft wire to the plastic funnel.

Secure it tightly around the apex of the funnel.

It should now look like this.

The cage will eventually be like this, but first…

..pass the funnel through the metal ring..

The funnel should fit snugly against the ring like this.

The flexible plastic tabs should be flush against the netting.

Attach the wire to the supporting bar of the Epsilon trap.

The cage should now be self-supporting like this.

Now attach the plastic bag to the plastic cage.

When completed, the cage should look like this.