I have never tried it but that looks like it will work. Just be sure your diagnosis is correct before you go that way. Usually there are one or two "traces" that survive and prove that the system is getting enough power. Provided you measured the voltage while the grid was attached then your diagnosis should be correct. Another way to go is get a new rear windshield. I would get the advice of a glass guy who is probably very familiar with the problem.

Mike

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1998 C230 330,000 miles (currently dead of second failed EIS, yours will fail too, turning you into the dealer's personal human cash machine)
1988 F150 144,000 miles (leaks all the colors of the rainbow)
Previous stars: 1981 Brava 210,000 miles, 1978 128 150,000 miles, 1977 B200 Van 175,000 miles, 1972 Vega (great, if rusty, car), 1972 Celica, 1986.5 Supra