I'd like to hear the answer as well. Took the tank off and then had to guess where it went when it fell off. It looks like there could be some kind of strap that threads through the bottom slots but no straps on mine.
Just noticed a pic in Tcro's stick coils post in the "For Sale" forum
http://zggtr.org/index.php?topic=61.0. The pic was posted by Centex and shows the isolater.