Take 4 screws out of gauge cluster and pull it out of dash. You will find the ground screw up behind the heater cables (if equipped). The bolt is stuck through the firewall with wires attached to both sides. The back side of bolt is reached through open doghouse as someone else mentioned.I know I should know this, but could you send a pick and location of "the ground behind the dash?" Every time I see a grounding point I clean and coat it. I may have missed this one. Thanks!