Fix keybord cable before replacement

I need to replace the keyboard of my MBP because sone key stopper working and I think it’s because the connector is damnaged. Before proceed, I’ve searched here some similar questions and found also one where there is an attacched video with the needed steps. I’m looking for a written guide I can follow, but my question is, can I fix only the connector instead of replacing the whole keyboard? To do the fix I need to remote the battery and display or I can avoid? If I Remo e the battery how I will put it in place again, is there a special take I can found on Amazon that I can use?