I just installed my exhaust brake. I found a novel way to pass the wires through the hood release grommet. I removed the grommet from the firewall and slid it down the release cable. I used an ice pick and a sleeve for RC control rod. I slid the sleeve over the ice pick and then inserted the pick though the grommet until the sleeve protruded. I removed the ice pick and pulled the wire through the sleeve and slid the sleeve out of the grommet.
After all the wires were through the grommet, I slide the grommet toward the firewall slowly pulling each wire further through the grommet until I could insert the grommet into place.
After all the wires were through the grommet, I slide the grommet toward the firewall slowly pulling each wire further through the grommet until I could insert the grommet into place.