I love the SpiderLight system for my mirrorless camera and having the tether has absolutely saved my camera from some falls. I originally had it attached to the strap loop at the top of the camera body, but since the SpiderPin attachment is at the bottom it could be minorly annoying because there were two different tension points, and the strap hung over the LCD sometimes. I got this kit to move the attachment point for the tether down by the Pin and out of the way.

When it arrived I wasn't able to seat it in the channels of the SpiderLight plate. The ends of the wire were too long and the bends weren't quite right. After taking a grinding wheel on my Dremel to the ends for about 5 seconds each side, they fit just fine. I was able to screw the top plate on without issue, the SpiderLight plate attached flush, and the tether is exactly where I want it.