Head out to your local craft shop and buy some little tiny beads, about 1- 2 mm in diameter.
Then get a bit of stiff wire that is thin enough to go through the hole in the beads. I got my wire at an R/C airplane store. Take a couple beads with you to make sure the wire fits.
Using a pin vice, drill a tiny hole in the front of the Panzer III. It should be the same diameter as the wire.