how do I wire a single conductor pickups to a single master volume guitar?

You can't coil tap a single conductor pickup. It's completely impossible.

To set up a master volume you need to hook the pickups up the the switch, then send the hot signal from the switch to the low terminal of the volume pot. Wiper arm goes to the tip contact of the output jack.

The Seymour Duncan site provides diagrams for tons of setups. They aren't the best diagrams, or the best circuits (ground loops aplenty, keep it buzzing like a hive!), but they'll give you an idea of how it needs to be set up.