In most window air conditioners, the vents are located on the top part of the unit. This design allows for the cool air to be directed upwards into the room while drawing in warm air from the bottom. The warm air is then expelled through the back of the unit, usually outside the window. By venting the cool air at the top and expelling warm air at the back, window air conditioners can efficiently cool the room.
However, it's worth noting that there can be variations in the design of window air conditioners, and some models may have vents located differently. It's always a good idea to check the specific model or consult the product documentation to confirm the venting configuration of a particular window air conditioner you are interested in.