Even the puzzle parts of Impossible Mission are generated randomized and might vary from game to game. So it won't be possible to show an exact solutions.
But David Dahle sent me this image as guide for solving the puzzle. If you manage to get these figures with two parts you are usually on the right way and it should not be difficult anymore to find the other two parts. But there can also be games, where even these figures might be misleading and the puzzle looks odd until you find the last piece.
The idea behind this picture is using it as a reference to help pick out possible matches among the collected pieces.
You can also find interesting informatin about the game there.