Tecnolux JC09CA16B1R290 Mode D'emploi page 62

1.3.2. Elongate the exhaust pipe and snap the flat end of the
exhaust pipe joints into the hole of the window sealing plate
assembly (as shown in Fig.5 and Fig.6).
Notes：
The flat end of the exhaust pipe joints must be snapped into
place.
The pipe cannot be distorted nor has substantial turning
(greater than 45 °). Keep the ventilation of the exhaust pipe
not blocked.