1. Feed wire, secure on one end
2. Tighten wire (it should twang when plucked), secure second end
3. Remove wedge
3. Install foundation, Install wedge
4. Embed wires in foundation.
If you want tight wires, use grommets. Otherwise the wire will break when tightening, or won't get tight enough. Jigs are nice, I'm lazy and try to create jigs for anything I'll make more than once. Try making a frame wiring jig- holds the wire spool, pinches the frame sidebars, and allows easy tensioning of the wire. That way you won't wear out your fingers pulling thin wire, or twist any frames :)