The family wanted to hot tub tonight, of course, so I had to Macgyver a solution. I wound up wrapping a small zip tie around the cam and super glued the zip tie around the cam. I also put super glue in the zip tie locking mechanism, then after it dried, I filed off the zip tie locking mechanism so it wouldn't cause problems as the cam rotates. It worked out and we be tubbin'. I suspect the previous owner overtightened the nut that locks the upper and lower cams, which snapped the lower. I just hand tightened the nut.