I had the same issue when restoring my 1981 One Thousand. I just came up with a small washer that fit the "Allen" side that was of the same diameter ....... this kept the bolt from screwing in as deep, allowing a screwdriver to stay in place on the opposite side. Worked perfect.
http://www2.snapfish.com/snapfish/sl...360_161597360/
Also, my 1981 model does NOT have the knurled edges on either side like yours, and I'm not quite sure why there would be a difference in manufacturing being we each have the same bolt design. Where you have the knurling, my bike has nicely rounded and painted edges. Could be the 1982 version used a different style bolt.