Add the two armatures, but don't screw them into place yet - you may need to make adjustments.

Screw the other end of the armature into the eye plate.

You'll have to guesstimate where to place the speakers. Look all around the perimeter so that you know where adhesive should go.

Mix-up some more 5-minute epoxy and put a good-sized helping on the plate.

Put the entire rig on a table and adjust the eye-plate so that it's flat and parallel to the tabletop. Then, place your speakers into the adhesive.

5-minute epoxy is pretty good... but I'd wait more like 30 minutes just to be safe.

Add the mouth with a bit of hot-glue.

If the bare wood dowel bothers you... a black Sharpie can fix that in a jiffy.

Voila!