That rectangular piece on top is where the tray fits in. In PKDM liana, that piece is fixed i.e., there is no cabin filter. Here is a trick: take a paper cutter and carefully cut that rectangular plastic piece out. It will come out easily but be steady with the cutter since the plastic is soft and you don't want to cut it at the wrong angle. Once done, there will be a rectangular hole there. Now go to any used parts market, buy an ac filter tray, put a new filter in it and shove it inside that opening. That's it. Your car now has a cabin air filter. 
