Hi to all, While upgrading my Ram from 4 to 8 GB on my MacBook Pro Early 2011, I noticed some small switches when the Back Cover removed. I found an image on the internet and I have put a blue cycle on these little switches. Any clue what are they? I thought they might be for intrusion alert when open the Cover but no, the Mac Power's up even with the cover removed. thank you guys, nice to meet you.