Not really sure. I got my arb second hand and there was only one light in it. There was however a plug but since there is no light in the factory bumper i would think it would be a splice job. FWIW I just 86'd the lights and left the amber piece in place. Have been running around with it that way for a year now with no worries.
My ARB Bull Bar's turn signal lights came with a wiring harness that was long enough to reach common ground points on both sides of the engine compartment, just behind the radiator. I spliced the positive leads into the existing turn signal wiring, then wrapped them in electrical tape and tie wrapped them. With the Kaymar rear bumper, I'm up to 4 bulbs per side now and the factory flasher still works fine. I'm holding my breath to see what happens when I plug my trailer in - and I want to evetually add flashing side marker lights.
Anybody successfully flashing 10 or 12 bulbs total with the factory flasher, or have a part number for a heavy duty or electronic flasher that will plug right in and hack such a load? Thanks, BigMac