Just cut a small hole in the rubber piece that surrounds the steering column.
As for the power supply, I just placed the power wire into the fuse that controls the dashboard lights. That way, when I turn on my headlights, my gauges light up with my other dash lights.
Good luck,
E
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1991 5.0 LX Coupe - 40,750 miles
331 cu. in. / Tremec 3550 / BFG Drag Radials
12.22 @ 114.31 mph - w/1.89 60'
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