So as not to short-circuit the pins and the motherboard. 【USE Solution】:Providing a convenient solution for changing the installing direction of USB 3.0 20 pin/19 pin cables with the 90 degree (L-Turn Down) Angled adapter.By allowing the USB 3.0 20 pin/19 pin cable to be installed at a 90 degree angle, builders are no longer need to wrap or fold the cable up and back over the motherboard and reduce the amount of cables needed in front of the motherboard tray.