I tried to use my drill bit but the hole is JUST the right size for the wire. Even a small amount of scotch tape just got stuck. I think I've finally figured it out. Drill, ream with bit a LOT, straighten wire as much as possible, stick it in the hole (hehe) and then HOPE it comes out the back. The first one took 20 minutes, the last one I did took 2. If I were doing a larger layout it might be an enough to drive me nuts, but I can do even the most tedious acts for a little while.