2013 XC70 Antenna....

Well... my idiot boyfriend (ha ha ha) knocked the antenna bezel fully off the roof of my '13 XC70 a couple of weeks ago while clearing snow from the car. I haven't gotten a good look on the roof yet to see what the mounting mechanism is, but the bezel is fully intact.

Does anyone have intel on how this bezel actually adheres to the roof? I am looking at this diagram on Smythe Volvo and it is totally unclear to me. I am fairly confident that between myself and my father, we can DIY the repair. Just need to know what particular bracket/screws/[insert hardware here] I need to purchase in order to re-attach it correctly.