Hello! There are two places to put it, one is the upper left corner of the picture (placed in the east-west direction), and the other is the upper right corner. It is recommended to be in the upper left position of the picture, because the upper right position is too close to the window. If you sleep too close to the window, firstly, the light is strong, and secondly, the window also collects air (inlet and outlet), which can easily affect your sleep and body.
Hope this helps!