HP CM6049F MFP - Manual (Page 218)

2. Push up to on the staple cartridge to remove it from the booklet maker or stapler/stacker.
3. Insert the replacement staple cartridge unit into the stapler unit.
4. Push the staple cartridge unit into the stapler unit until it clicks into position.
5. Close the front door.
202 Chapter 14 Manage and maintain the product ENWW