The white boxes are just sitting on it, but the unpainted i"square tubeing sticking up are stakes that slip down into some square tubing sunk into the beds and hold some 18" sideboards. The tw0 rods on the back are hinges that hold a tailgate that is covered with expanded metal so that when folded down flat the lights shine through and when flat two pieces of square tubing pins into the tvo angles you see on the bumper making the bed 20" longer for hauling hay. You fold it up for use as a tail gate when you have the side boards on. I sunk the liscence plate 2" and used truck lites pushed into rubber available anywhere truck or trailer parts are sold, and any truckstop as is the pig tails and all are available in led.