The quick answer is "no". The material is installed, front to back, then is finished by bringing the material down to the package tray shelf, and pulled tight under rods made of modified (bent) headliner bows. I'm looking at terrible pictures I took back in the 90's, and I partially installed the side AND rear window trim, to hold the headliner material in place, before stretching it downward, to finish it. I understand the rods were just used to install the material, then removed and reused on the other side. I have pictures somewhere of a couple birds that had them left in place, but not always. After pulling the material tight, I glued it to the top of the package shelf tray. When finished, the actual package shelf further "pulls" on the material to keep it taut, as much as I could remember.
On the second picture, the rod is shown installed. There is a hole on the window plug and on the frame in front of the package shelf. (I've seen these rods on eBay, if you're looking for a good picture.)
View attachment 929190 View attachment 929192