Can anyone help identify why this Apple II service part appears from the factory to be unusable? I found this service part, opened the box, and the loose “.” key has baffled me since. Network magic please.

This is Apple part number 658-5016 Numeric Keypad A II – and it did not include the numeric keypad housing – just the board, in bubble wrap, plus a manual for “MODEL NO. A2M0056” (and the loose period key). Apple mailing address on the manual warranty page is for 20525 Mariani Avenue, Cupertino.