Don't do the streering wheel grommet. There is an EXTREMELY easier access point via the A/C lines. It is above and to the left of the streering wheel grommet. It is just a foam preasure fit. It is embarassingly easy and easy to miss.
Don't use the streering wheel control rod grommet as you will likley catch your truck on fire at some time. Lack of mounting control + constantly moving streeing wheel rod + 4 or 8 gauge barrery cable = fire at some time.
Really, look at the air conditioner return lines in the firewall, nothing could be easier and safer.