You do NOT want to tap into those wires as they transport signals (some digital) to the VX's computer. Easiest way is to get fuse taps at Radio Shack and piggy back on a micro fuse in the fuse panel on the side of the driver's side dash - the radio or cig lighter is good. Ground (black wire) can be any screw that goes into the steel body under the dash. Red wire should be fused and probably already on the CBs wire. The CB should also have basic instructions for connecting it.