Cadillac 1994 DeVille Owners Literature page 301

Do the same with the passenger side wiper blade assembly.
To install the wiper blade, align the wiper arm pin with the hole on the
wiper blade assembly and snap it into place.
If you only want to replace the wiper inserts follow these steps:
1. Gently pull the insert from the blade housing.
2. Reinstall the new insert by aligning the blade housing tabs and the
edge of the insert. Make sure that the insert is connected to all the
housing tabs.
3. Install the wiper blade assembly to the wiper arm.
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