Copper tubing is your friend when you want to give your watch a steampunk look. Spacers for the screws were made with 1/4" OD copper tube cut to about 0.26" length, you may need to try a few times to get the right length (I had to), but you can use the extra pieces in the cover for the battery wires. To cover the battery wires thread the wire through the small pieces of copper tube until you have covered up to the connector.
Magnifying lenses like the ones in the picture make a great addition to the look. You may need to remove one of the spacers to allow them to clip onto the screw or you can glue or solder the lenses to one of the spacers.