I just purchased a used boat that has clear marker lights on the inside of the trailer rails under the boat. These are not working with the running lights but it has a electric boxed mounted at the rear of the trailer that is labeled Launchmate 2 Automatic trailer lighting system, is this the control for these rail lights? Do they activate them once the trailer and box is submerged in water? I haven't had a chance to put the boat in the water yet and was wondering what this box is?