Instrument Cluster Removal

So I took a fine wire wheel with my dremel and gently buffed that broken circuit.
Has anyone ever had any luck at soldering that back together? If I do where am I supposed to tie that broken black wire back into? Also the pin for that wire is a bit loose. If I can successfully solder the strip I guess I could put a dab of solder at the base of that particular pin? cleaned broken circuit.jpg