You assemble this universal window seal according to the pictures below.
More information on this product see following link: https://www.tristar.eu/en-gb/tristar-products/tristar-parts-accessories/climate-control-parts/airconditioner-parts/unbranded-xx-555500-universal-window-kit-xx--555500
Please take note that the cloth should not be cut. The fabric is 100% polyester and can be washed at a maximum temperature of 40 degrees. We recommend washing at 30 degrees for longer life.
This solution is valid for Model AC-5555 and XX-555500.