New dash bulbs not working

Good info on the grounding. I reinstalled dash but it still didnt seem to work properly. I have to wait til 1am for my jump box to be fully charged, after that I'm going to do more diagnosis. I have a shop manual for a 74 duster, but its stuck in my cd drive on my computer with a blown cpu. How can I connect a ground jumper to the dash? Should I follow where a ground wire hits the printed board and just solder on a wire and screw it into metal somewhere or is there a method?