How to reattach green "hook"

The green "hook" in mine is loose and will not go back in. (The hook is the green part which sits in the blue area on the left and holds the cash tray.) Does anyone know how to fix this?

해당 질문 답변하기 저도 같은 문제를 겪고 있습니다

좋은 질문 입니까?

점수 0
의견 추가하세요