The supply line that connects to the underside of the bathroom faucet uses a "quick connect" pin.
What is this type of connection called?
More info: I am installing a water filter for the bathroom sink. The house was built using those cheap plastic all in one stop valves, so the supply line cannot be removed without replacing the stop valve also.
The problem I am encountering is the 1/2 end of the supply line that connects to the underside of the faucet uses a quick connect mechanism. One end simply "butts up against" the faucet threads and is held in place with a pin.
To simplify the replacement process, I want to buy a supply line with this type of "quick connect/disconnect", but I don't know the proper term to use when searching.
EDIT: After posting the pictures, I recall now why I didn't try to remove the "top" clamp. What is the purpose of that hose? There is one that comes from both the hot and cold supply line that meets in the middle.