Kyocera FS-C1020MFP - Manual (Page 433)

Tilt the print cartridge forward and pull it out.
From the rear, the print cartridges are installed in the order of cyan (C), magenta (M), yellow (Y), and
black (K).
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Do not shake the removed print cartridge. Doing so can cause remaining toner to leak.
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Place the old print cartridge on paper or similar material to avoid dirtying your workspace.
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The toner color is indicated by the label on each print cartridge.
Take the new print cartridge out of the box, and then take it out of the plastic bag.
Hold the print cartridge and shake it from side to side five or six times.
Even distribution of toner within the bottle improves print quality.
Remove the cover from the print cartridge.