Garmin wireless camera bc 20

I did not have a Garmen but I too mounted high and ran the cable under the rubber gasket that covered the screws that held on my rain gutter. I tried a low mount when I was pulling doubles to watch my boat tires. The only way I could keep the lens clean was to mount it in a piece of 4 in PVC sewer pipe attached below the bumper. It worked fine for watching the tires but I would not have tried to back the 5er from that perspective view.

I recommend trying a few different mounting spots to get the best view for you.