Pull card slot.
The shelf behind the Oaks vertical air conditioner is disassembled and assembled. There is a card slot on both sides of the cabinet of the cabinet air conditioner. Just pull the card slot and pull it out to open the back shelf.
Oakes generally refers to Oaks Group Co., Ltd., which was founded in 1986. Its industries cover home appliances, power equipment, medical care, real estate, investment and other fields.