I had a local machine shop make the modified bolt to extend the length two inches. The cable "bung" also requires modification, had the machine shop do that as well.
Word of note: On older Ride-Guide racks, the cable adapter bung is secured to the rack by two pass through bolts. Newer racks, like the one I have, the bung is actually staked to the rack. Luckily, I had an older style rack to use for this mod.
One can still use the staked bung but will require additional machine work.