Yes -- you just drag the files from the Finder and drop them on the Pages app. So, in KM, this will work:

...unless you are suffering from the "opening in a specific app throws an error" problem, in which case you can resort to one of the fixes in this thread.
After that it depends on what you want to do with the converted files. Using KM to fire up a "Save…" menu and fill in the path etc is well documented on the Forum. Pages is also AppleScriptable so you could
tell application "Pages"
tell document 1
save in file "Macintosh HD:Users:myUserName:Desktop:myFileName.pages"
end tell
close document 1
end tell
Further tweaks depend on details. How do you want files naming? Where should the converted copies be saved. Etc.