I never thought to try using any kind of lube, but actually, with the amount of wire and connector mass you are trying to tug through those small holes, any lubricant would probably just make your fish wire slip out of the electrical tape wrap. You have to really space all the connectors to a different point of entry with the tape and wire as you try to pull them through the bar. I thought about cutting the connectors off and reinstalling new ones but the instructions had "thrown down the gauntlet" and I was going to get those damm wires through even if they were longer and a smaller guage when I was done!
