Here is a pic of how the driver side mount is installed originally. There is a lock washer on the other side on the head of the bolt. The top bolt WILL shake loose and back off due to all of the vibration over time. Luckily the two 1/2" bolts protrude just enough to add a lock nut.

I tried adding an all metal lock nut but they were too thick so I used thin nylock nuts with red locktite and marked them as well.

I called Schumacher and they said that they will take note of the issue