Swap you ... you give me your egg recipes and I will put that key back on for ya' .
Should snap in.. but takes some aligning.. there should be a spring.. could be built in.. or discrete. if it is .. rip one of the other key that you don't use much like the "admin alert" button , and use its parts.
Be very very careful if you decide to take the kb out for any reason. The connectors on the motherboard are hard to get to if you pull the harness out.. and they are a bear to get back in without breaking something.
Please send 20$ in care of ifish technical support to Roy , he is starting up a new computer support business and I am his low cost geography support person