Locks work opposite to what you think. Push them full IN (white loop against the connector) to release the catch ring. Takes some pulling and tugging to get the lines to release. You can seat the new line without messing with the white clip, just push it in until it clicks. I had to look at the clip on the new hose to figure exactly how they worked. You'd think you have to pull the clip off or out, but it's just the opposite.