if you accidentally pull a balance pin out you should easily be able to push it back in
if you pulled the wire off the pin then simply detach the pin, solder, place shrink tubing over the repair and push the pin back in
+1
I like to purchase these 200mm JST extensions to charge my 4S packs without the board:
https://www.amazon.com/Balance-Extension-Battery-Charging-Silicone/dp/B07Q29TG24
For 2S, I use a charge cable similar to this where you need to trim the raised notch on the left side to plug either 2S or...