In the Z00D model there is no copper sheet present.
In the model Z00D there are only two clips.
For Asus Zenfone 2 ZE500C, the adhesive is on the left side (opposite side of the antenna), so it is easier to start lifting the battery from the right side. Also, there is another connector strip, going from top left to bottom left, glued onto the battery cage, which most be peeled off first.
For my phone (ASUS Zenphone 2 ZE500CL), I had to undo 18 screws in order to get the panel off.