Central vacuum lock ring repair for wall outlet

So I have a central vacuum in my house. The hose that connects to the wall has a basic locking notch to prevent the hose from turning at the wall otherwise the vacuum will not stay powered on. This notch has worn down over the years causing headaches with keeping the vacuum running. I designed a very simple slip on ring for the end of the hose that helps keep the hose locked in properly to the wall outlet. The wall outlet shows made by Nutone It's a simple design and could be improved upon but works well for my needs.