how/where to reconnect home button

Hi,

I'm desperate for help...

My iphone 4 is now completely taken apart and I don't understand how to reconnect the new home button that I've bought on this site to replace the old, unresponsive button.

I think I have taken off the old one correctly but when doing so I didn't see exactly how it was connected. I tried reading on the forum to find an answer but since I don't know the name of the different parts I simply don't understand the jargon used...

How I see it is that I have a plastic flat flexible ribbon, at the tip of which are some metallic golden parts which must connect to the other metallic golden parts on the phone. However I don't understand if I am supposed to slide the ribbon in somewhere or just put it back on??

Now I'm starting to think it was a huge mistake trying to do that myself and that this very expensive phone is now dead for good... Help!! thank you. Vane