I don't have a picture handy, but mine you just sort of push on the hose and they let go/grab depending on whether you are disconnecting or connecting. Sometimes it takes a couple of tries.
I found out the other night that quick disconnects don't cooperate on the connecting if they are pressurized. My FEL bucket wasn't in a relaxed state when I disconnected and I couldn't reconnect the hose because the 'pin' couldn't be pushed back enough to let things mate up. I relieved the pressure in the hose pby pushing the pin back with a clean 3/8 extension. Messy, but problem solved....