You could install the top 3 x 420mm fan tray in the front.
If you need to, after removing the top fan tray, you can remove the top of the case. There are some screws attaching it to the sheet of metal that has 4 holes in it for the fans. Also you can remove the top rails that support the top fan tray. Then you can drill holes in the metal sheet that has the 4 large holes for the fans to mount radiator(s) and/or fans where you want. This is discussed at the start of this video: