Connect green alligator clip to the pin that is fed by the green and white wire in the test port.
Ground the Mighty Actron to the bolt as shown in pic. Pretty much any old bolt will do that goes to ground.
Use dwell and 8 cyl scale - double numbers. 0-90 is duty cycle range on 4 cyl. You want dithering around 45 after doubling numbers which is 50% duty cycle. So the Actron on 8 cyl dwell should have needle a little above 22.5 and a little below as is dithers.