John Murray has instructions for the install in digital form. Frankly, I do not like them. They came from the manufacturer.
I have mine installed and can take some pics. My largest mistake was not pulling the coiled wires up with a lead wire. I tried inserting them from the top. Mistake corrected.
I did most of mine just by looking at the parts and thinking. Putting the rotating lights together is both simple and confusing. The wing nuts are at the bottom of the metal base plate, attach the coiled wires to the lights before putting on the metal base plate. There are some spacers to separate the rotating lights from the metal base. Simple enough, really.
The curled wiring is very simple. There is a ground wire on each that attaches to the cab or frame on either side. The positive wires plug in to the second lead on the curled wire. Run the power wire around under the cab to find a power source, I used the horn wire and a dual socket adapter, with the other wires going into the cab and the on/off switch.
It is cloudy here and looking to rain, again, so I may not get the pics until tomorrow or Monday if it keeps raining.