Another way to ground a tele bridge without a hole in the body (and my preferred method) is via one of the bridge pickup mounting/adjustment screws.

You solder an eye terminal to the bridge ground wire, then when you mount the pickup to the bridge plate, slip the eye terminal over one of the mounting screws between the bottom of the bridge plate and the mounting spring. The eye terminal makes contact with the bridge and the screw, which passes through to the brass plate of the bridge pickup. Everything is tied together now. D-u-n... dun.