Hand Control Lid Holder Clip
So the clip assembly is similar in shape to the hand controller rear profile, and clips on the same hook and pins. While I may tweak the top, the current design does not clear the top and you have to bend the part slightly to clip it, which provides enough tension to keep it in place. The two holes were intended for thumbscrews to provide tension, but there's already enough that it doesn't need them, and they don't prevent the part from popping off. I may look for a different retention feature.