Screen not responding after battery replacement

Hello,

I've replaced my battery on my Pixel 3a, but for some reason the screen does not come on after reassembly.

I've tried my damnest to be careful, and I'm afraid I've killed it in the process. Some "lines" have appeared on the screen after removal.

Here are pictures of one of the line, and the connector to see if things are wrong.

Thank you for your help.