I would say quickest (like 3 minutes, if you're really being careful): buy alligator clip "test leads" (favorite auction site, electronics site, whatever), and splice them to any mini usb cable of your choice. Scissors and tape will do the job, but you get bonus points for using solder and heat shrink.
Or, if you don't like the looks of spliced cables, get bare alligator clips, and either solder or splice/wrap the cut usb cable directly to the alligator clips.