cable holder for ESP32 CAM for Prusa enXLosure

The esp32 cam addon for the enXLosure (https://www.printables.com/model/633675-esp32_cam-mount-for-prusa-enxlosure) is a nice feature but there is no obvious way to hold the USB cable in place. This adds small little holders to hold the USB cable for the esp32 cam using the screws of the enclosure. 

 Per holder a M3 nuts and a 18mm or longer M3 screw is required. 18mm gives the perfect fit seen in the picture but longer screws like 20 mm should also work. I am aware that using an additional M3 nut on the screw will not allow the cable holder to be screwed completely tight but they still hold the cable quite well