Not sure if this is the place to ask it, so feel free to move the thread. I've circled in red two parts on the teardown as I am trying to find out what they are for and what they are called (see attachment). I have googled, looked at iFixit and a plethora of other sites, but can't find the name for what I am looking for. Having WiFi-No Hardware Found issues, I found that one of these (on the right) was loose. After placing it back into its position, my WiFi troubles have ceased to exist. I know the airport card is located elsewhere - left of the ram memory. Just out of curiosity I am trying to understand if that had anything to do with it. Or if it's simply coincidence that it being loose and now back in its place and wifi working again. In any case, got to clean my macbook thoroughly as well.