It depends on the polygon topper. IF your topper looks like this one in the below picture (this is the backlight only) then there is a controller card that is sold seperatly and you must have in order for it to communicate with the avp. The USB plugs into it and it plugs into the controller card. You have to have this if you do not use the glitterbar. It also works with a glitterbar when attached and you DO NOT have to have the card. I attached some pics for you. This topper uses a pretty thick cable. I attached a pic of it as well so you can see how it plugs together