What is this part? - not sure where it goes

Question

MacBook Pro 15" Retina Display Mid 2012 Repair

2.3GHz, 2.6GHz, or 2.7GHz quad-core Intel Core i7 processor (Turbo Boost up to 3.7GHz) with 6MB shared L3 cache.

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vito @ivito

crwdns2934065:0crwdne2934065:0: 13

1

crwdns2931729:0crwdne2931729:0: Dzi 6, 2016

crwdns2933897:0crwdne2933897:0

What is this part? - not sure where it goes

Hi there, I took apart my macbook to replace the upper case and while putting it back together I have found a part and I am not sure where it belongs. below is a picture of this part. forgive my noobyness but how do I send a pic on this forum - any help will be appreciated.

here is the part i was talking about

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crwdns2853045:0crwdne2853045:0 crwdns2853046:0crwdne2853046:0

crwdns2889612:0crwdne2889612:0 1

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I've been working on apple products for 37 years and never seen that part.

crwdns2934271:0Dzi 6, 2016crwdnd2934271:0 mayer crwdne2934271:0

not 100% but looks like it comes from the screen/ upper case mounting screws?

crwdns2934271:0Dzi 8, 2016crwdnd2934271:0 Alex Hus crwdne2934271:0

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I've been working on apple products for 37 years and never seen that part. — mayer
not 100% but looks like it comes from the screen/ upper case mounting screws? — Alex Hus