I was surprised about that and looked for a source. Here it is: https://www.ifixit.com/Teardown/MacBook-Pro-15-Inch-Unibody-Early-2011-Teardown/4990/2#s22468 ht

I was surprised about that and looked for a source. Here it is: https://www.ifixit.com/Teardown/MacBook-Pro-15-Inch-Unibody-Early-2011-Teardown/4990/2#s22468 https://www.ifixit.com/Teardown/MacBook-Pro-15-Inch-Unibody-...