Do you have any idea what piece of electrical equipment this used to house?( See pictures) It came from the dome/roof between the visors in my 89 pioneer, and I would like to restore whatever it was while I'm replacing my headliner, but searching the internet, I am having no luck figuring out what belonged there. I'm pretty sure it wasn't a light. Huge thank you if you can solve this mystery for me!

 

Receiver for keyless entry.