A safety chain engaging device for a towing vehicle having a gooseneck hitch attached with a rail of the towing vehicle is shown and described. The scan-based integrated circuit contains multiple scan chains, each scan chain comprising multiple scan cells coupled in series. The PCB includes a removable portion that, when removed, leaves an opening that receives an RF antenna connector. The receiving container can be drained at a time and place convenient for an individual. When the solar light voltage exceeds a predetermined voltage, the boosting of the chopper circuit is stopped, thereby reducing power loss due to the boosting.