The Rigid Industries 40194 Wiring Harness is a complete 11' wiring
harness that's designed to connect a single Rigid Industries 4" ~ 6" LED
light to your 12V electrical system. It features battery terminals on
one end and a Deutsch connector on the other to connect to the light. It
incorporates an inline fuse holder, a 12V relay, and a waterproof
switch. This harness is compatible with the following Rigid Industries
LED Lights: Dually (Single), D2 (Single), 4" E-Series, 6" E-Series, 4"
SR-Series, 6" SR-Series.