Fire Alarm Mystery

Hi everyone:

Hope you had a good break over the holidays. I have been meaning to ask you if you can help me identify the handle on the fire alarm outside my unit in 10851. Based on what I see the handle is not installed. However, Josh tells me that handle is there and I don't know how to use it. Please help me out and tell me where the handle is. Picture is attached.

Thanks,

Anisa