There ya go, only have to hook up the large connector, notice the red and black ***s I have put beside each pin number on the second connector, red is positive 12V and black is ground. This will light up everything, the tach should have the first bottom LED lit up, if it doesn't the tach is dead.
I use alligator clip jumpers right to the pins on cluster and two 6V flashlight batteries in series to make 12V or a power supply. Using a 12V car battery is scary because if you slip up you can blow something up with the available amperage.