Sometime back I had a pair of similar speakers and they do need to be connected between the two speakers through an "umbilical cable" which was quite ordinary wire but with special plugs. On a temporary basis, you should be able use 18 guage wire to which you can tin the ends with solder to fatten them to the approximate size of the connector at the speaker end and help secure it with some tape. If you're unable to find the plugs, you can figure out how best to secure your connection more permanently with a more sophisticated tape application. For my own needs, I needed to extend the original cable and did so by adding wire in this fashion. Good luck.
Polk SDA Speaker info needed...
I've got some older Polk SDA 1A dimensional array speakers and people are telling me that the sound is much better when you use the cable that connects the two speakers together. Can anyone varify this and also tell me how I might hook mine up just for a listen without having the polk cable? Thanks..