Apple Color StyleWriter Pro - Manual (Page 14)

Installing the ink cartridges
The Color StyleWriter Pro uses four numbered and color-coded ink
cartridges—black (#1), cyan (#2), magenta (#3), and yellow (#4).
To install a cartridge, follow these steps:
1 If the printer cover is closed, open it.
2 Remove the top of the ink cartridge’s plastic bag by peeling off the tape in the middle.
WARNING Be careful to put each color in the appropriate slot on the
print head carriage. If you mix up the colors, the printer won’t print as it
should.
7 Setting Up Your Printer