Ok, I have a quick question. 
  
So, I have some of these sockets, with brackets: 
  
 
  
I need to somehow embed a nut into the bracket, so I can then secure them to the top of the chassis. I won't have access to the bottom of the socket. 
  
I don't know much about PEM nuts, but I was wondering if something like that might work. I'm leary to try an adhesive, or soldering, etc. but maybe it might work, but I'd prefer a better solution. 
  
If someone wants to make me a bracket, that's a different story, but let's assume that's not a viable option either.