I have to replace my MacBook White top case, but I decided to do it by myself, because sending the notebook to maintenance is too expensive. I've read some tutorials, but I'm confused in that part of disconnecting this silver wire of a top case and then connect it to the new top case. Where will I have to connect and disconnect the wire exactly? I've got an image:

My keyboard is exactly like this: 13" MacBook TopCase Housing BRAND NEW(White) 922-9550 922-9592 605-2432 | eBay

But I don't know how to find the part number, and I'm afraid of buying the top case and it is not compatible.

Thank you already.