I recently had the same issue with a speaker.
My solution was to remove the plate, unsolder the broken connector and remove it.
I then a attached an extension wire and connect it to the speaker cable so I could continue using the speaker
With the broken part removed, I was able to identify a suitable replacement.
speaker connector broke
I am in need of the connector or terminal for my Focal electra CC 1000Be central speaker. I was tighten the cable and the connector broke.
I got in touch with Focal America and they do not have the connector, they says my speaker is an old model.
Does anybody know,where I can find this connector
Thanks