Do you mean the guitar's bridge, or the baseplate of the bridge pickup?
I don't see why you'd need to solder a ground wire to the bridge, string grounding on a Tele is normally via the pickup's baseplate. If there's no pickup baseplate (like on some recent American Standards), Fender use a separate ground wire which sits under the bridge, but it's not soldered, it's just held in place by the contact between the bridge and the top of the body.
