For camera's with a Micro-B USB connection (some Nikons), this cable goes from the OTG adaptor to the camera (on the Original Timelapse+; with the new VIEW Intervalometer it connects directly).  This is a good-quality, short cable that's very reliable for controlling the camera with the Timelapse+.  Long cables are not recommended.

Note: a camera USB cable is included with the purchase of the VIEW Intervalometer