just had a study of realoem and by the looks of it the springs are connected to the wires that go through the edges of the fabric and keep it taut...does you roof look a bit sad at the edge where there is no spring?
have a look at pics 7&8 in this link and you will see them hanging down!
http://www.shareaproject.com/pages/imag ... 24,00.html
this comes from another set of roof fitting instructions
" Insert a catch wire through the side cable sleeve so that it goes in the front and out the back.
* Catch the ferule at the end of the tension cable and pull it through the sleeve.
* Return the end of the side tension cable to its place at the front of the weatherseal retainer and push it back into the groove.
* With a pair of pliers or vice-grips crimp the cable tightly into the groove. Then check the cable to make sure it is tight.
* Re-install the door glass weatherseal retainer to the horizontal frame member. Don't forget the washer for the back screw. "
best of luck
david