I removed the instrument cluster to repair the odometer gears and in putting the cluster back in I'm having the hardest time trying to put the light and wires back in the tach. I assume it's the small black receptical with two wires going to it, is there any trick to it? I also tried the light when not connected but it wouldn't light so I figured once it's in the hole it somehow grounds on the prong in the hole. Any help will be appreciated also maybe a picture or two, Thanks, Greg.P.S. Do I even have the right wire/ I think I do.