QMS Magicolor 330 Manual page 35

8 Hold the cartridge so the
arrow is at the top.

Caution: Each toner cartridge has a color-coded end that
corresponds to a colored cartridge slot. Always install the
toner cartridge in the slot with an end of the same color. Each
cartridge is physically (as well as visually) keyed to ensure
correct installation.
9 Align the toner cartridge
with the cartridge guides.
10 Carefully push the cartridge
into the printer until it's
firmly seated.

Caution: If a toner cartridge doesn't slide in easily, don't force it.
Check that you're installing the correct color toner cartridge into
the correct slot.
11 Rotate the toner cartridge
clockwise until the "    " mark
on the cartridge is aligned
with the Lock
the printer.
    
position on
6dv
    
LOCKED