What to secure drivers side mirror thats falling off?
 

The top corner of my drivers side mirror is falling of, there doesnt seem to be a bolt, or fastener to secure it to. Would you use hot glue, or epoxy, jb weld even? to fix this? Do i need to pull it off and see how it attaches?

Car is a 2001 GSR coupe with power, folding mirrors. Tried search, nothing on the topic. Thanks