iPhone 6 antenna problem

I have network problem with my iphone 6.

The problem is sometime i lost signal. I have analize around and found that i have problem with my antenna. When i lost signal all i need to do is squeeze my iphone and the signal will back to normal.

My question is ;

How is bottom antenna work? I heard that iphone 6 use bottom part as the antenna itself but where is the connector. I only found one connector bellow battery connector and then no more so how i can fix network problem on my iphone?

Please dont ask me to reset since i already fix and now that this problem is hardware problem