Using this HDMI Round Panel Mount Plug is a breeze. First, find a suitable spot on your wood, plastic, or metal panel. Then, use a common hole - saw or bit to drill a 30mm hole. Next, unscrew the plastic nut on the plug. Insert the plug through the hole and re - attach the nut. You'll then have two HDMI sockets on either side for connecting cables. When it comes to the panel, make sure it's up to 16mm thick or as thin as a few mm. As for maintenance, keep the plug clean and dry. Avoid using sharp objects on the sockets as it may damage them. If you're not using the plug for a long time, store it in a cool, dry place.