Hi there,
feel your pain !
a) can you solder?
b) if not find a local dealer who can
if you still have the tag & have any qualms about soldering give it to someone who can - there will not be much leeway so it has to be done right or you will be looking at having the arm re-wired, not cheap.
It's part of the joy of tables & when you get it up & running it will be worth it!
Si