3x 120mm fan mount for TOTEN System G 19" server rack

The inside of the rack can become quite hot. This will make it possible to mount 3 120mm fans to the top of the rack. The exhaust is a hole in the rear top of the rack. This might fit other racks than the Toten System G. The mounting holes does not exist in the rack, therefore 4 3.5mm holes need to be drilled in the metal of the rack. The fan duct is split into 3 parts to make it possible to print on a normal sized printer. Then 4 pins are needed to connect them. For me no glue was needed but I used some zip-ties to be sure. No supports are needed anywhere.