I tried using some Arctic 4028-15k PWM fans in my BentoBox, and I didn't feel like trying to reroute the 4-wire cable through the fan housing. Instead, I made some cutouts in the fan case so the cable neatly runs down the floor of the fan case module.

Additionally, I could only find M3x30mm machine screws to attach the fans to the case. The original case doesn't have enough depth to bottom out a screw that long, nor is it tall enough to add spacers on the top of the screws. I've added 2mm to the base to accommodate the M3x30mm screws.