Horizontally surface mount using bolts in back of lamp, run wire and plug through hole in fixing surface. Load resistors must be mounted on metal surface, the module can reach temperatures of up to 170 Celsius. Please refer to ADR 13/00 for mounting instructions. Adapted to fit most popular brands of vehicle trays. Prewired with 2 x load resistors and terminated. Combine with applicable patch lead. IP67 100 percent water proof. Patch Leads to suit the following vehicles Ford Ranger, Mazda BT50, Isuzu D-Max, Toyota Landcruiser, Toyota Hilux, Mitsubishi Triton MN/MQ, Holden Colorado, Nissan Navara, Volkswagen Amarok, Mercedes-Benz X-Class.