Glue the clips back in proper position. Should be easy to see where they go by the old glue. My 95 has black pieces glued to the door panel. Then white plastic pieces screw into the black part which then press into the door.
On my 95, several black/white clips came off when I removed the front door panels and had to reglued. In fact the door pockets came loose as well. Back doors had no problems with clips.
Thanks,
1995 525i Auto, M50TU 2.5L, EAT chip, 1/95 build, USA, 205/65/15 tires, ASC+T, HID, lumbar, EC Mirror, BMW Alpine 5 radio with BMW-Pioneer CD Changer, abt 236k miles, Oxford Green/Parchment