USB3 Under Desk Dock

I made a USB3 Dock to be mounted under my desk riser shelf. Used these USB3 extension cables from Delock → https://www.amazon.de/DeLock-Kabel-USB-3-0-Verlaengerung/dp/B002V9JZUO?pd_rd_w=jhdJE&content-id=amzn1.sym.dfd01cf6-0f98-4000-a541-0d253c79534b&pf_rd_p=dfd01cf6-0f98-4000-a541-0d253c79534b&pf_rd_r=QK64ZG5SP1147A55X7JK&pd_rd_wg=WPuAy&pd_rd_r=35af5703-4563-4388-8d1a-9e3f3d98e62e&pd_rd_i=B002V9JZUO The mounting-holes are 3mm wide and are sinked. Measurements of the dock: 65x50x20mmMeasurements of the USB3 extension connectors: 18x11mm