Window lifter broken, door panel disassembled.

Hello together, yesterday morning on the driver side of the window lifter said goodbye. It just gnawed for a short time and something fell down in the door. Fortunately the disc remained up. Reperaturset and new clips arrive the days. Who has removed the panel of the door before and can give me relevant clues where screws hide, how to get to these without damage and what else there are for obstacles. greeting Sascha