The noise sounds like it is coming from up under the keyboard but I am not for sure. The sound only happens if I pick up or happen to tilt it to the left or right. Although today it started making a noise when the fan came on which has never happened before.
The small user manual that came with you MBP has those instructions where they describe how to install RAM. If you cannot find it, go to the OWC website>Tech Support>Installation Videos and look for your particular model and open the video.