'Searching' for network after screen change - Did I break a connector?

I was trying to change a broken LCD on iphone 4s and it appeared as if a screw had worn out after repeated tries by the previous owner.

My attempts to unscrew it had worse results as the connector the screw tightened into came undone from the motherboard.

My question is, now that my phone works perfectly otherwise but is stuck on 'Searching' when it comes to the mobile network, is that break in connection the reason for the network not working?

The condition of the phone is such that the shield I have pointed out in the picture has no link with the motherboard because of the broken connection while the other screw is in place.

Just pushing it down to make the connection should have corrected the network problem if it is the cause?

- Tried it, doesn't work.

- Tried resetting the phone's settings. No luck.

Guidance on the function of the connector that has come undone and a possible solution would be great.

Thanks for taking the time to read.