Repairs reverse shutoff fix Craftsman lt 1500 Silver Edition

My mower would not shut off when I put it in reverse with the blade engaged. I found that the shut off connection had come uncoupled. It was not easy to find because it was under the tractor on the left front side of the rear axle as you view the mower from the behind the rear wheels. It apparently had come unplugged since it does hang down some. After I plugged it in the engine quit if the tractor was placed in reverse while mowing.