LC997C4s

I am familiar with the typical procedures to remove the sunroof (unfortunatley I had to replace a broken cable some months ago). But at that time, I was able to get the sunroof to open slightly so as to be able to remove the windstop, liner, etc. Now the other cable broke and the sunroof will not retract at all (not even 1/4"). So how do I get in there to access the necessary parts to remove the sunroof? Is there a way for me to gain access to the transmission assembley from the zipper in the head liner to somehow grab onto the cables?

Any suggestions appreciated.