HP CM6049F MFP - Manual (Page 207)

5. Remove the new print cartridge from its protective bag.
NOTE: Store the protective bag in a secure place for future use.
6. Hold both sides of the cartridge and shake up and down 5-6 times.
7. Align the print cartridge with its slot and insert the print cartridge until it clicks into place.
8. Insert additional print cartridges in the same manner.
ENWW Replace supplies 191