Grab 10 feet of 12 gauge wire and two alligator clips. Strip off about 3 inches of sheathing from the wire and feed it through the little hole in the clip. Now twist that wire really tight, you don't want it coming loose. Repeat for the other side of the wire. Now, grab one end and feed it under the dash and through the firewall. Drill a hole if you need to. Clip it to a strut housing or something metal like that. Now clip the other end to your bag. Grounded (maybe)!