Yes Sugar, indeed they can and that's what I'm using. I soldered them with RadioShack silver solder and threaded them through the binding posts. Still you will have to clean it often but with much better convenience.
Question for users of bare wire ends speaker cable
There have been discussions on the use of bare wire ends as being the best way to get a good quality speaker cable connection. The only downside is the need to re-do the connection often because of the corrosion of the copper. As a part way measure can the ends be soldered or something else, to cut down or stop the corrosion without adversely affecting the signal??