Step 1: Cut a path for the wire.
2 feet stiff wire
I used the red and black from some BX cable laying around (red for positive DC, black for negative DC) but coat hanger would work just as well. I can't imagine stranded wire would work well, but anything goes so long as it will stand still.
2 pieces scrap wood
Old wood dressers are the best place to scrounge nice finished wood. I think this project used up the last few scraps. Anything thin will do, I recommend having it sanded so you don't get a splinter while soldering.
2 salvaged alligator clips
For some reason I always have a few clips laying around. If you don't, any electronics supplier will.
( Radio Shack )
( Interior Electronics )
2 small bolts long enough to pass through both pieces of wood
Try looking in your sock drawer, I can always find some there.
Needle nose pliers
Drill with large and small bits
Rotary tool with router bit
Use the router bit to cut a path for the wire to lay in. Put holes through at each end for the wire to poke through. Because stiff wire will not lie perfectly flat, you will have to cut pretty deep for the wire to fit in.