connectors, no you do not need to use it. The HDMI and DVI-to-HDMI cables both have a USB connector built into them for the touchscreen. This can be a good thing for some people... but i would have actually preferred a seperate HDMI and USB cable. My computer is built inside the DIN and that 6 foot HDMI cable really crams things up behind my bezel. Something else that you may need to consider is the HDMI cable sticks out of the side of the controller board the same way the VGA cable did in prior lilli's. the HDMI connector and gauge of the cable makes it a severely tight fit if you're building into a bezel thats not made to accomodate it. I purchased a swiveling right-angle HDMI adapter to solve this problem.