A silly question I know but I want to replace the terminal block in my garage so I bought one of these - it’s where the 2.5mm cable enters the garage and connects to another 2.5mm cable. I thought it would be the same setup - a connector block inside a plastic case. No screws though, just seems to be a spring loaded connector. Push the lever down, insert the wires from either end then just let go. Is that it? Does it just grip by spring tension alone?