Panasonic DP-2500 Operating Instructions Manual page 52

Options
Finisher/Exit Guide Unit
3. When replacing the Staple
1
2
3
4
52
The message shown on the left
appears when the staples are out.
Hold the latch and pull out the
Finisher.
Remove the Staple Cartridge.
# Remove the empty Staple Case.
$ Install the new Staple Case.
Pull out the tape.