Shop Nilight 10Pcs 3 Led Trailer Light 3.9 Inch Front Rear Side Marker Lights Clearance Indicator Waterproof Sealed Surface Mounted Marker Light for RV Truck Trailer UTE UTV 12V in high quality, support 2 Years Warranty. Black wire for ground, red wire for positive. just fix the black base with the flat head screws provided, and then snap the light into the base.