I need to replace the refrigerator light switch on my 1994 #532. I am very handy and feel confident that I can mangae the task but I am stumped by the plastic "connector" that seccures the two wires (black and orange) to the switch. It appears that there is some sort of floating plastic "key?" but I can't figure it out for the life of me. I suspose I can just crack it open but then what. What is the secret please?