I've watched videos and ordered the right type of connector. It doesn't seem so hard with flood soldering techniques.
Fortunately the break is clean and happened on the connector's legs, so the traces are unharmed. I think the hardest part will be to remove the remnants left on the traces.
Thanks for the lead! That might be it, I saw a big blob of goop leaking from it the first time I heated it. I'll rebuild the hotend when I have time. There an extra nozzle in the kit.
Edit:
Here is a comparison between an old benchy done with my Ender-3 and three with the SV-08. The surface finish with the Ender 3 is much more consistent and the PETG is a lot shinier. Maybe speed is a factor too. Shoud I try and slow the SV08 down a notch?