Remove the cartridge from the finisher on the copier (typically by pulling slightly up and sliding out)
Place your fingers over the "push" labels and Squeeze (you do not want to squeeze in other areas as you may disassemble the whole unit)
While squeezing lift the top portion, it will come to a stop creating an opening at the back.
Align the arrows for the new staple cartridge and insert the staples and cardboard into the open space.
Press down on the top until it clicks.
Remove the pull tab.
Reinsert into finisher (typically by sliding into carriage and pressing down for a click)
This covers many (but not all) copier finisher (internal and external) models including but not limited to Canon imageRunner, Ricoh, Konica, Minolta, Sharp, Lexmark, Xerox, etc
