Yes very important if it were not for his post the same fate would have been mine. This was a lot easier than I thought!
Quote from Vladimir Silantyev:
Warning, there is small magnet on right side of LCD. Do not forget to place it back with new LCD.
I accidentally removed it with old LCD, it sticked to it, and now MacBook do not sleep when closing lid. I need to reassemble it again.
Sorry i did not take any pictures, trust me it is there and you cant miss it.
Quote from amccombs:
I do not see the magnet, a photo would be nice.