I did a step by step video for that on a Dyna but I don't know where it is on here (or even if it's still on here). I use a shop vac to pull the string through, works fast. If your wires go inside the bars you'll need to disconect the pins from the connectors (under the backbone frame) and pull them out and then fish them back thru.
Here is the the youtube video of the bar install. If you need the wiring video I will have to hunt it down. My email notification doesn't work but I check back every now and again. Anyhow you can do it, it's not that hard, you just have to make sure and write down all you wire connections BEFORE you take them loose. As you notice in the video I tie all the stuff to a ceiling brace, helps keep it out of the way while you work. I removed my tank, makes it sooo much easier to work.
BarInstall - YouTube