Well you are a bit off the thread's topic, but I'll take this as a bump
Search for site for Renegade bar installation and you'll find the pointer for the original PDF document; you'll need this for the exact placement. I didn't have any wires either so I went to Radio Shack for 10 gauge wires, relay, fuse (both rated 30A) and a simple black switch. Go online and buy a nutzerts/threaded nut tool (bought mine at hot rod auto supply) to secure the bar on the roof. You'll find that drilling and installing those nuts is not that bad.
Run the 10 gauge wires from the roof thru the A pillar down to the firewall and up to the battery area. Following the PDF as a general guideline is a good way to do it. I just installed the fuse and relay directly off the main fuse box in front of the battery, connected one side of the relay to the parking + and run the ground line back into the dash. That way I need to have the parking light on to fire the light bar.
Took me about 5hrs with all the thinking around, but it's worth the effort!